Mobile phone
![](https://upload.wikimedia.org/wikipedia/commons/thumb/8/8d/Mobile_Phone_Evolution_1992_-_2014.jpg/290px-Mobile_Phone_Evolution_1992_-_2014.jpg)
Amobile phoneorcell phone[a]is a portabletelephonethat can make and receivecallsover aradio frequencylink while the user is moving within a telephone service area, as opposed to a fixed-location phone (landline phone). The radio frequency link establishes a connection to the switching systems of amobile phone operator,which provides access to thepublic switched telephone network(PSTN). Modern mobile telephone services use acellular networkarchitecture, and therefore mobile telephones are called cellphones (or "cell phones" ) in North America. In addition totelephony,digital mobile phonessupport a variety of otherservices,such astext messaging,multimedia messaging,email,Internet access(viaLTE,5G NRorWi-Fi), short-range wireless communications (infrared,Bluetooth), satellite access (navigation,messaging connectivity), business applications,payments(viaNFC),multimediaplayback andstreaming(radio,television),digital photography,andvideo games.Mobile phones offering only basic capabilities are known asfeature phones(slang:"dumbphones"); mobile phones that offer greatly advanced computing capabilities are referred to assmartphones.[1]
The first handheld mobile phone was demonstrated byMartin CooperofMotorolainNew York Cityon 3 April 1973, using a handset weighing c. 2 kilograms (4.4 lbs).[2]In 1979,Nippon Telegraph and Telephone(NTT) launched the world's first cellular network in Japan.[3]In 1983, theDynaTAC 8000xwas the first commercially available handheld mobile phone. From 1983 to 2014, worldwide mobile phone subscriptions grew to over seven billion; enough to provide one for every person on Earth.[4]In the first quarter of 2016, the top smartphone developers worldwide wereSamsung,AppleandHuawei;smartphone sales represented 78 percent of total mobile phone sales.[5]For feature phones as of 2016[update],the top-selling brands were Samsung,NokiaandAlcatel.[6]
Mobile phones are considered an important human invention as they have been one of the most widely used and sold pieces of consumer technology.[7]The growth in popularity has been rapid in some places, for example, in the UK, the total number of mobile phones overtook the number of houses in 1999.[8]Today, mobile phones are globally ubiquitous,[9]and in almost half the world's countries, over 90% of the population owns at least one.[10]
History
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A handheld mobile radio telephone service was envisioned in the early stages of radio engineering. In 1917,FinnishinventorEric Tigerstedtfiled a patent for a "pocket-size folding telephone with a very thin carbon microphone". Early predecessors of cellular phones includedanalogradio communications from ships and trains. The race to create truly portable telephone devices began after World War II, with developments taking place in many countries. The advances inmobile telephonyhave been traced in successive "generations", starting with the early zeroth-generation (0G) services, such asBell System'sMobile Telephone Serviceand its successor, theImproved Mobile Telephone Service.These 0G systems were notcellular,supported a few simultaneous calls, and were very expensive.
![](https://upload.wikimedia.org/wikipedia/commons/thumb/7/74/DynaTAC8000X.jpg/110px-DynaTAC8000X.jpg)
The first handheld cellular mobile phone was demonstrated byJohn F. Mitchell[11][12]andMartin CooperofMotorolain 1973, using a handset weighing 2 kilograms (4.4 lb).[2]The first commercial automated cellular network (1G)analogwas launched in Japan byNippon Telegraph and Telephonein 1979. This was followed in 1981 by the simultaneous launch of theNordic Mobile Telephone(NMT) system in Denmark, Finland, Norway, and Sweden.[13]Several other countries then followed in the early to mid-1980s. These first-generation (1G) systems could support far more simultaneous calls but still usedanalogcellular technology. In 1983, theDynaTAC 8000xwas the first commercially available handheld mobile phone.
In 1991, the second-generation (2G) digital cellular technology was launched in Finland byRadiolinjaon theGSMstandard. This sparked competition in the sector as the new operators challenged the incumbent 1G network operators. The GSM standard is a European initiative expressed at theCEPT( "Conférence Européenne des Postes et Telecommunications", European Postal and Telecommunications conference). The Franco-German R&D cooperation demonstrated the technical feasibility, and in 1987, a Memorandum of Understanding was signed between 13 European countries that agreed to launch a commercial service by 1991. The first version of the GSM standard had 6,000 pages. TheIEEEandRSEawardedThomas HaugandPhilippe Dupuisthe 2018James Clerk Maxwell medalfor their contributions to the first digital mobile telephone standard.[14]In 2018, the GSM was used by over 5 billion people in over 220 countries. The GSM (2G) has evolved into 3G, 4G and 5G. The standardization body for GSM started at the CEPT Working Group GSM (Group Special Mobile) in 1982 under the umbrella of CEPT. In 1988,ETSIwas established, and all CEPT standardization activities were transferred to ETSI. Working Group GSM became Technical Committee GSM. In 1991, it became Technical Committee SMG (Special Mobile Group) when ETSI tasked the committee with UMTS (3G). In addition to transmitting voice over digital signals, the 2G network introduced data services for mobile, starting withSMStext messages, then expanding toMultimedia Messaging Service(MMS), andmobile internetwith a theoretical maximum transfer speed of 384 kbit/s (48 kB/s).
![](https://upload.wikimedia.org/wikipedia/commons/thumb/e/ee/Dupuis_Haug_GSM_around_1990.jpg/220px-Dupuis_Haug_GSM_around_1990.jpg)
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In 2001, the third-generation (3G) was launched in Japan byNTT DoCoMoon theWCDMAstandard.[15]This was followed by 3.5G or 3G+ enhancements based on thehigh-speed packet access(HSPA) family, allowingUMTSnetworks to have higher data transfer speeds and capacity. 3G is able to providemobile broadbandaccess of severalMbit/stosmartphonesandmobile modemsin laptop computers. This ensures it can be applied to mobile Internet access,VoIP,video calls, and sending large e-mail messages, as well as watching videos, typically instandard-definitionquality.
By 2009, it had become clear that, at some point, 3G networks would be overwhelmed by the growth of bandwidth-intensive applications, such asstreaming media.[16]Consequently, the industry began looking to data-optimized fourth-generation (4G) technologies, with the promise of speed improvements up to tenfold over existing 3G technologies. The first publicly availableLTEservice was launched in Scandinavia byTeliaSonerain 2009. In the 2010s, 4G technology has found diverse applications across various sectors, showcasing its versatility in delivering high-speed wireless communication, such as mobile broadband, theinternet of things(IoT),fixed wireless access,and multimedia streaming (including music, video,radio,andtelevision).
Deployment of fifth-generation (5G) cellular networks commenced worldwide in 2019. The term "5G" was originally used in research papers and projects to denote the next major phase in mobile telecommunication standards beyond the4G/IMT-Advancedstandards. The3GPPdefines 5G as any system that adheres to the5G NR(5G New Radio) standard. 5G can be implemented in low-band, mid-band or high-band millimeter-wave, with download speeds that can achievegigabit-per-second(Gbit/s) range, aiming for a network latency of 1 ms. This near-real-time responsiveness and improved overall data performance are crucial for applications likeonline gaming,augmentedandvirtual reality,autonomous vehicles,IoT, and critical communication services.
Types
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Smartphone
Smartphoneshave a number of distinguishing features. TheInternational Telecommunication Unionmeasures those with Internet connection, which it callsActive Mobile-Broadband subscriptions(which includes tablets, etc.). In the developed world, smartphones have now overtaken the usage of earlier mobile systems. However, in the developing world, they account for around 50% ofmobile telephony.
Feature phone
Feature phone is a term typically used as aretronymto describe mobile phones which are limited in capabilities in contrast to a modernsmartphone.Feature phones typically providevoice callingandtext messagingfunctionality, in addition to basicmultimediaandInternetcapabilities, and other services offered by the user'swireless service provider.A feature phone has additional functions over and above a basic mobile phone, which is only capable of voice calling and text messaging.[18][19]Feature phones and basic mobile phones tend to use a proprietary, custom-designedsoftwareanduser interface.By contrast, smartphones generally use amobile operating systemthat often shares common traits across devices.
Infrastructure
![](https://upload.wikimedia.org/wikipedia/commons/thumb/e/ee/Frequency_reuse.svg/220px-Frequency_reuse.svg.png)
The critical advantage that modern cellular networks have over predecessor systems is the concept offrequency reuseallowing many simultaneous telephone conversations in a given service area. This allows efficient use of the limitedradio spectrumallocated to mobile services, and lets thousands of subscribers converse at the same time within a given geographic area.
Former systems would cover a service area with one or two powerfulbase stationswith a range of up to tens of kilometers' (miles), using only a few sets of radio channels (frequencies). Once these few channels were in use by customers, no further customers could be served until another user vacated a channel. It would be impractical to give every customer a unique channel since there would not be enoughbandwidthallocated to the mobile service. As well, technical limitations such as antenna efficiency and receiver design limit the range of frequencies a customer unit could use.
Acellular networkmobile phone system gets its name from dividing the service area into many small cells, each with a base station with (for example) a useful range on the order of a kilometer (mile). These systems have dozens or hundreds of possible channels allocated to them. When a subscriber is using a given channel for a telephone connection, that frequency is unavailable for other customers in the local cell and in the adjacent cells. However, cells further away can re-use that channel without interference as the subscriber's handset is too far away to be detected. The transmitter power of each base station is coordinated to efficiently service its own cell, but not to interfere with the cells further away.
Automation embedded in the customer's handset and in the base stations control all phases of the call, from detecting the presence of a handset in a service area, temporary assignment of a channel to a handset making a call, interface with the land-line side of the network to connect to other subscribers, and collection of billing information for the service. The automation systems can control the "hand off" of a customer handset moving between one cell and another so that a call in progress continues without interruption, changing channels if required. In the earliest mobile phone systems by contrast, all control was done manually; the customer would search for an unoccupied channel and speak to a mobile operator to request connection of a call to a landline number or another mobile. At the termination of the call the mobile operator would manually record the billing information.
Mobile phones communicate with cell towers that are placed to give coverage across a telephone service area, which is divided up into 'cells'. Each cell uses a different set of frequencies from neighboring cells, and will typically be covered by three towers placed at different locations. The cell towers are usually interconnected to each other and the phone network and the internet by wired connections. Due to bandwidth limitations each cell will have a maximum number of cell phones it can handle at once. The cells are therefore sized depending on the expected usage density, and may be much smaller in cities. In that case much lower transmitter powers are used to avoid broadcasting beyond the cell.
In order to handle the high traffic, multiple towers can be set up in the same area (using different frequencies). This can be done permanently or temporarily such as at special events or in disasters. Cell phone companies will bring a truck with equipment to host the abnormally high traffic.
Capacity was further increased when phone companies implemented digital networks. With digital, one frequency can host multiple simultaneous calls.
Additionally, short-rangeWi-Fiinfrastructure is often used by smartphones as much as possible as it offloads traffic from cell networks on to local area networks.
Hardware
The common components found on all mobile phones are:
- Acentral processing unit(CPU), the processor of phones. The CPU is amicroprocessorfabricated on ametal–oxide–semiconductor(MOS)integrated circuit(IC) chip.
- Abattery,providing the power source for the phone functions. A modern handset typically uses alithium-ion battery(LIB), whereas older handsets usednickel–metal hydride(Ni–MH) batteries.
- An input mechanism to allow the user to interact with the phone. These are akeypadfor feature phones, andtouch screensfor most smartphones (typically withcapacitive sensing).
- Adisplaywhich echoes the user's typing, and displays text messages, contacts, and more. The display is typically either aliquid-crystal display(LCD) ororganic light-emitting diode(OLED) display.
- Speakersfor sound.
- Subscriber identity module(SIM) cards and removable user identity module (R-UIM) cards.
- A hardwarenotification LEDon some phones
Low-end mobile phones are often referred to asfeature phonesand offer basic telephony. Handsets with more advanced computing ability through the use of native software applications are known assmartphones.The firstGSMphones and manyfeature phoneshad NOR flash memory, from which processor instructions could be executed directly in an execute in place architecture and allowed for short boot times. With smartphones, NAND flash memory was adopted as it has larger storage capacities and lower costs, but causes longer boot times because instructions cannot be executed from it directly, and must be copied to RAM memory first before execution.[20]
Central processing unit
Mobile phones havecentral processing units(CPUs), similar to those in computers, but optimised to operate in low power environments.
Mobile CPU performance depends not only on the clock rate (generally given in multiples ofhertz)[21]but also thememory hierarchyalso greatly affects overall performance. Because of these problems, the performance of mobile phone CPUs is often more appropriately given by scores derived from various standardized tests to measure the real effective performance in commonly used applications.
Display
One of the main characteristics of phones is thescreen.Depending on the device's type and design, the screen fills most or nearly all of the space on a device's front surface. Many smartphone displays have anaspect ratioof16:9,but taller aspect ratios became more common in 2017.
Screen sizes are often measured in diagonalinchesormillimeters;feature phones generally have screen sizes below 90 millimetres (3.5 in). Phones with screens larger than 130 millimetres (5.2 in) are often called "phablets."Smartphones with screens over 115 millimetres (4.5 in) in size are commonly difficult to use with only a single hand, since most thumbs cannot reach the entire screen surface; they may need to be shifted around in the hand, held in one hand and manipulated by the other, or used in place with both hands. Due to design advances, some modern smartphones with large screen sizes and" edge-to-edge "designs have compact builds that improve their ergonomics, while the shift to taller aspect ratios have resulted in phones that have larger screen sizes whilst maintaining the ergonomics associated with smaller 16:9 displays.[22][23][24]
Liquid-crystal displaysare the most common; others areIPS,LED,OLED,andAMOLEDdisplays. Some displays are integrated with pressure-sensitive digitizers, such as those developed byWacomandSamsung,[25]and Apple's "3D Touch"system.
Sound
In sound, smartphones and feature phones vary little. Some audio-quality enhancing features, such asVoice over LTEandHD Voice,have appeared and are often available on newer smartphones. Sound quality can remain a problem due to the design of the phone, the quality of the cellular network and compression algorithms used inlong-distance calls.[26][27]Audio quality can be improved using aVoIPapplication overWiFi.[28]Cellphones have small speakers so that the user can use aspeakerphonefeature and talk to a person on the phone without holding it to their ear. The small speakers can also be used to listen to digital audio files of music or speech or watch videos with an audio component, without holding the phone close to the ear.
Battery
The average phone battery lasts two–three years at best. Many of the wireless devices use a Lithium-Ion (Li-Ion) battery, which charges 500–2500 times, depending on how users take care of the battery and the charging techniques used.[29]It is only natural for these rechargeable batteries to chemically age, which is why the performance of the battery when used for a year or two will begin to deteriorate. Battery life can be extended by draining it regularly, not overcharging it, and keeping it away from heat.[30][31]
SIM card
![](https://upload.wikimedia.org/wikipedia/commons/thumb/7/7f/Typical_cellphone_SIM_cards.jpg/170px-Typical_cellphone_SIM_cards.jpg)
Mobile phones require a smallmicrochipcalled a Subscriber Identity Module orSIM card,in order to function. The SIM card is approximately the size of a small postage stamp and is usually placed underneath the battery in the rear of the unit. The SIM securely stores theservice-subscriber key (IMSI)and theKiused to identify and authenticate the user of the mobile phone. The SIM card allows users to change phones by simply removing the SIM card from one mobile phone and inserting it into another mobile phone or broadband telephony device, provided that this is not prevented by aSIM lock.The first SIM card was made in 1991 by Munich smart card makerGiesecke & Devrientfor the Finnish wireless network operatorRadiolinja.[citation needed]
A hybrid mobile phone can hold up to four SIM cards, with a phone having a differentdevice identifierfor each SIM Card. SIM andR-UIMcards may be mixed together to allow bothGSMandCDMAnetworks to be accessed. From 2010 onwards, such phones became popular in emerging markets,[32]and this was attributed to the desire to obtain the lowest calling costs.
When the removal of a SIM card is detected by the operating system, it may deny further operation until a reboot.[33]
Software
Software platforms
![](https://upload.wikimedia.org/wikipedia/commons/thumb/0/0f/Android_phones.jpg/220px-Android_phones.jpg)
![]() | This sectionneeds expansion.You can help byadding to it.(October 2018) |
Feature phones have basic software platforms. Smartphones have advanced software platforms.Android OShas been thebest-selling OSworldwide on smartphones since 2011.
Mobile app
A mobile app is a computer program designed to run on a mobile device, such as a smartphone. The term "app" is a shortening of the term "software application".
- Messaging
![](https://upload.wikimedia.org/wikipedia/commons/thumb/e/e3/IPhone_Text_Message_Amber_Alert_1882467856_o.jpg/220px-IPhone_Text_Message_Amber_Alert_1882467856_o.jpg)
A common data application on mobile phones isShort Message Service(SMS) text messaging. The first SMS message was sent from a computer to a mobile phone in 1992 in the UK while the first person-to-person SMS from phone to phone was sent in Finland in 1993. The firstmobile newsservice, delivered via SMS, was launched in Finland in 2000,[34]and subsequently many organizations provided "on-demand" and "instant" news services by SMS.Multimedia Messaging Service(MMS) was introduced in March 2002.[35]
Application stores
The introduction of Apple's App Store for the iPhone and iPod Touch in July 2008 popularized manufacturer-hostedonline distributionfor third-party applications (software and computer programs) focused on a single platform. There are a huge variety of apps, includingvideo games,music products and business tools. Up until that point, smartphone application distribution depended onthird-party sourcesproviding applications for multiple platforms, such asGetJar,Handango,Handmark,andPocketGear.Following the success of the App Store, other smartphone manufacturers launched application stores, such as Google's Android Market (later renamed to the Google Play Store), RIM'sBlackBerry App World,or Android-related app stores likeAptoide,Cafe Bazaar,F-Droid,GetJar,andOpera Mobile Store.In February 2014, 93% ofmobile developerswere targeting smartphones first for mobile app development.[36]
Sales
By manufacturer
Rank | Manufacturer | Strategy Analytics report[37] | ||
---|---|---|---|---|
1 | Samsung | 21% | ||
2 | Apple | 16% | ||
3 | Xiaomi | 13% | ||
4 | Oppo | 10% | ||
5 | Vivo | 9% | ||
Others | 31% | |||
Note: Vendor shipments are branded shipments and exclude OEMsales for all vendors. |
As of 2022, the top five manufacturers worldwide were Samsung (21%), Apple (16%), Xiaomi (13%), Oppo (10%), and Vivo (9%).[37]
- History
From 1983 to 1998,Motorolawas market leader in mobile phones.Nokiawas the market leader in mobile phones from 1998 to 2012.[38]In Q1 2012,Samsungsurpassed Nokia, selling 93.5 million units as against Nokia's 82.7 million units. Samsung has retained its top position since then.
Aside from Motorola, European brands such as Nokia,SiemensandEricssononce held large sway over the global mobile phone market, and many new technologies were pioneered in Europe. By 2010, the influence of European companies had significantly decreased due to fierce competition from American and Asian companies, to where most technical innovation had shifted.[39][40]Apple and Google, both of the United States, also came to dominate mobile phone software.[39]
By mobile phone operator
The world's largest individual mobile operator by number of subscribers isChina Mobile,which has over 902 million mobile phone subscribers as of June 2018[update].[41]Over 50 mobile operators have over ten million subscribers each, and over 150 mobile operators had at least one million subscribers by the end of 2009.[42]In 2014, there were more than seven billion mobile phone subscribers worldwide, a number that is expected to keep growing.
Use
![](https://upload.wikimedia.org/wikipedia/commons/thumb/e/e7/Mobile_phone_subscribers_1997-2014_ITU.svg/350px-Mobile_phone_subscribers_1997-2014_ITU.svg.png)
Mobile phones are used for a variety of purposes, such as keeping in touch with family members, for conducting business, and in order to have access to a telephone in the event of an emergency. Some people carry more than one mobile phone for different purposes, such as for business and personal use. Multiple SIM cards may be used to take advantage of the benefits of different calling plans. For example, a particular plan might provide for cheaper local calls, long-distance calls, international calls, or roaming.
The mobile phone has been used in a variety of diverse contexts in society. For example:
- A study byMotorolafound that one in ten mobile phone subscribers have a second phone that is often kept secret from other family members. These phones may be used to engage in such activities as extramarital affairs or clandestine business dealings.[43]
- Some organizations assist victims of domestic violence by providing mobile phones for use in emergencies. These are often refurbished phones.[44]
- The advent of widespread text-messaging has resulted in thecell phone novel,the first literary genre to emerge from the cellular age, viatext messagingto a website that collects the novels as a whole.[45]
- Mobile telephonyalso facilitates activism andcitizen journalism.
- TheUnited Nationsreported that mobile phones have spread faster than any other form of technology and can improve the livelihood of the poorest people in developing countries, by providing access to information in places wherelandlinesor the Internet are not available, especially in theleast developed countries.Use of mobile phones also spawns a wealth of micro-enterprises, by providing such work as selling airtime on the streets and repairing or refurbishing handsets.[46]
- InMaliand other African countries, people used to travel from village to village to let friends and relatives know about weddings, births, and other events. This can now be avoided in areas with mobile phone coverage, which are usually more extensive than areas with just land-line penetration.
- The TV industry has recently started using mobile phones to drive live TV viewing through mobile apps, advertising,social TV,andmobile TV.[47]It is estimated that 86% of Americans use their mobile phone while watching TV.
- In some parts of the world, mobile phone sharing is common. Cell phone sharing is prevalent in urban India, as families and groups of friends often share one or more mobile phones among their members. There are obvious economic benefits, but often familial customs and traditional gender roles play a part.[48]It is common for a village to have access to only one mobile phone, perhaps owned by a teacher or missionary, which is available to all members of the village for necessary calls.[49]
- Smartphones also have the use for individuals who suffer from diabetes. There are apps for patients with diabetes to self monitor their blood sugar, and can sync with flash monitors. The apps have a feature to send automated feedback or possible warnings to other family members or healthcare providers in the case of an emergency.
Content distribution
In 1998, one of the first examples ofdistributing and selling media contentthrough the mobile phone was the sale ofringtonesbyRadiolinjain Finland. Soon afterwards, other media content appeared, such as news, video games, jokes, horoscopes, TV content and advertising. Most early content for mobile phones tended to be copies oflegacy media,such as banner advertisements or TV news highlight video clips. Recently, unique content for mobile phones has been emerging, from ringtones andringback tonestomobisodes,video content that has been produced exclusively for mobile phones.[citation needed]
Mobile banking and payment
![](https://upload.wikimedia.org/wikipedia/commons/thumb/6/6e/Mobile_payment_01.jpg/220px-Mobile_payment_01.jpg)
In many countries, mobile phones are used to providemobile bankingservices, which may include the ability to transfer cash payments by secure SMS text message. Kenya'sM-PESAmobile banking service, for example, allows customers of the mobile phone operatorSafaricomto hold cash balances which are recorded on their SIM cards. Cash can be deposited or withdrawn from M-PESA accounts at Safaricom retail outlets located throughout the country and can be transferred electronically from person to person and used to pay bills to companies.
Branchless bankinghas also been successful in South Africa and thePhilippines.A pilot project inBaliwas launched in 2011 by theInternational Finance Corporationand anIndonesianbank,Bank Mandiri.[50]
Mobile payments were first trialled in Finland in 1998 when two Coca-Cola vending machines inEspoowere enabled to work with SMS payments. Eventually, the idea spread and in 1999, the Philippines launched the country's first commercial mobile payments systems with mobile operatorsGlobeandSmart.[citation needed]
Some mobile phones can makemobile paymentsvia direct mobile billing schemes, or throughcontactless paymentsif the phone and thepoint of salesupportnear field communication(NFC).[51]Enabling contactless payments through NFC-equipped mobile phones requires the co-operation of manufacturers, network operators, and retail merchants.[52][53]
Mobile tracking
Mobile phones are commonly used to collect location data. While the phone is turned on, the geographical location of a mobile phone can be determined easily (whether it is being used or not) using a technique known asmultilaterationto calculate the differences in time for a signal to travel from the mobile phone to each of severalcell towersnear the owner of the phone.[54][55]
The movements of a mobile phone user can be tracked by their service provider and, if desired, by law enforcement agencies and their governments. Both theSIM cardand the handset can be tracked.[54]
China has proposed using this technology to track the commuting patterns of Beijing city residents.[56]In the UK and US, law enforcement and intelligence services use mobile phones to perform surveillance operations.[57]
Hackers have been able to track a phone's location, read messages, and record calls, through obtaining a subscribers phone number.[58]
Electronic waste regulation
![](https://upload.wikimedia.org/wikipedia/commons/thumb/c/c6/Handy_schrott_mobile_phone_scrap.jpg/220px-Handy_schrott_mobile_phone_scrap.jpg)
Studies have shown that around 40–50% of the environmental impact of mobile phones occurs during the manufacture of their printed wiring boards and integrated circuits.[59]
The average user replaces their mobile phone every 11 to 18 months,[60]and the discarded phones then contribute toelectronic waste.Mobile phone manufacturers withinEuropeare subject to theWEEE directive,and Australia has introduced a mobile phone recycling scheme.[61]
Apple Inc.had an advanced robotic disassembler and sorter called Liam specifically for recycling outdated or broken iPhones.[62]
Theft
According to theFederal Communications Commission,one out of three robberies involve the theft of a cellular phone.[citation needed]Police data in San Francisco show that half of all robberies in 2012 were thefts of cellular phones.[citation needed]An online petition onChange.org,calledSecure our Smartphones,urged smartphone manufacturers to installkill switchesin their devices to make them unusable if stolen. The petition is part of a joint effort by New York Attorney GeneralEric Schneidermanand San Francisco District AttorneyGeorge Gascónand was directed to theCEOsof the major smartphone manufacturers and telecommunication carriers.[63]On 10 June 2013, Apple announced that it would install a "kill switch"on itsnext iPhone operating system,due to debut in October 2013.[64]
All mobile phones have a unique identifier calledIMEI.Anyone can report their phone as lost or stolen with their Telecom Carrier, and the IMEI would be blacklisted with a central registry.[65]Telecom carriers, depending upon local regulation can or must implement blocking of blacklisted phones in their network. There are, however, a number of ways to circumvent a blacklist. One method is to send the phone to a country where the telecom carriers are not required to implement the blacklisting and sell it there,[66]another involves altering the phone's IMEI number.[67]Even so, mobile phones typically have less value on the second-hand market if the phones original IMEI is blacklisted.
Conflict minerals
Demand for metals used in mobile phones and other electronics fuelled theSecond Congo War,which claimed almost 5.5 million lives.[68]In a 2012 news story,The Guardianreported: "In unsafe mines deep underground in eastern Congo,children are workingto extract minerals essential for the electronics industry. The profits from the minerals finance the bloodiest conflict since the second world war; the war has lasted nearly 20 years and has recently flared up again. For the last 15 years, theDemocratic Republic of the Congohas been a major source of natural resources for the mobile phone industry. "[69]The companyFairphonehas worked to develop a mobile phone that does not containconflict minerals.[citation needed]
Kosher phones
Due to concerns by theOrthodox Jewishrabbinate in Britain that texting by youths could waste time and lead to "immodest" communication, the rabbinate recommended that phones with text-messaging capability not be used by children; to address this, they gave their official approval to a brand of "Kosher" phones with no texting capabilities. Although these phones are intended to preventimmodesty,some vendors report good sales to adults who prefer the simplicity of the devices; other Orthodox Jews question the need for them.[70]
In Israel, similar phones to kosher phones with restricted features exist to observe thesabbath;under Orthodox Judaism, the use of any electrical device is generally prohibited during this time, other than to save lives, or reduce the risk of death or similar needs. Such phones are approved for use by essential workers, such as health, security, and public service workers.[71]
Restrictions
Restrictions on the use of mobile phones are applied in a number of different contexts, often with the goal of health, safety, security or proper functioning of an establishment, or as a matter of etiquette. Such contexts include:
While driving
Mobile phone use while driving, including talking on the phone, texting, or operating other phone features, is common but controversial. It is widely considered dangerous due todistracted driving.Being distracted while operating a motor vehicle has been shown to increase the risk of accidents. In September 2010, the USNational Highway Traffic Safety Administration(NHTSA) reported that 995 people were killed bydrivers distracted by cell phones.In March 2011, a US insurance company,State Farm Insurance,announced the results of a study which showed 19% of drivers surveyed accessed the Internet on a smartphone while driving.[72]Many jurisdictions prohibit the use of mobile phones while driving. In Egypt, Israel, Japan, Portugal, and Singapore, both handheld and hands-free use of a mobile phone (which uses aspeakerphone) is banned. In other countries, including the UK and France and in manyUS states,only handheld phone use is banned while hands-free use is permitted.
A 2011 study reported that over 90% of college students surveyed text (initiate, reply or read) while driving.[73] The scientific literature on the dangers of driving while sending a text message from a mobile phone, ortexting while driving,is limited. A simulation study at theUniversity of Utahfound a sixfold increase in distraction-related accidents when texting.[74]
Due to the increasing complexity of mobile phones, they are often more like mobile computers in their available uses. This has introduced additional difficulties for law enforcement officials when attempting to distinguish one usage from another in drivers using their devices. This is more apparent in countries which ban both handheld and hands-free usage, rather than those which ban handheld use only, as officials cannot easily tell which function of the mobile phone is being used simply by looking at the driver. This can lead to drivers being stopped for using their device illegally for a phone call when, in fact, they were using the device legally, for example, when using the phone's incorporated controls for car stereo,GPSorsatnav.
A 2010 study reviewed the incidence of mobile phone use whilecyclingand its effects on behaviour and safety.[75]In 2013, a national survey in the US reported the number of drivers who reported using their cellphones to access the Internet while driving had risen to nearly one of four.[76]A study conducted by the University of Vienna examined approaches for reducing inappropriate and problematic use of mobile phones, such as using mobile phones while driving.[77]
Accidents involving a driver being distracted by talking on a mobile phone have begun to be prosecuted as negligence similar to speeding. In theUnited Kingdom,from 27 February 2007, motorists who are caught using a hand-held mobile phone while driving will have three penalty points added to their license in addition to the fine of £60.[78]This increase was introduced to try to stem the increase in drivers ignoring the law.[79]Japanprohibits all mobile phone use while driving, including use of hands-free devices. New Zealand has banned hand-held cell phone use since 1 November 2009. Many states in the United States have banned texting on cell phones while driving. Illinois became the 17th American state to enforce this law.[80]As of July 2010[update],30 states had banned texting while driving, with Kentucky becoming the most recent addition on 15 July.[81]
Public Health Law Researchmaintains a list of distracted driving laws in the United States. This database of laws provides a comprehensive view of the provisions of laws that restrict the use of mobile communication devices while driving for all 50 states and the District of Columbia between 1992 when first law was passed, through 1 December 2010. The dataset contains information on 22 dichotomous, continuous orcategorical variablesincluding, for example, activities regulated (e.g., texting versus talking, hands-free versus handheld), targeted populations, and exemptions.[82]
On aircraft
In the U.S.,Federal Communications Commission(FCC) regulations prohibit the use ofmobile phonesaboard aircraft in flight.[83]Contrary to popular misconception, theFederal Aviation Administration(FAA) does not actually prohibit the use of personal electronic devices (including cell phones) on aircraft. Paragraph (b)(5) of 14 CFR 91.21 permits airlines to determine if devices can be used in flight, allowing use of "any other portable electronic device that the operator of the aircraft has determined will not cause interference with the navigation or communication system of the aircraft on which it is to be used."[84]
In Europe, regulations and technology have allowed the limited introduction of the use of passenger mobile phones on some commercial flights, and elsewhere in the world manyairlinesare moving towards allowing mobile phone use in flight.[85]Many airlines still do not allow the use of mobile phones on aircraft.[86]Those that do often ban the use of mobile phones during take-off and landing.
Many passengers are pressing airlines and their governments to allow and deregulate mobile phone use, while some airlines, under the pressure of competition, are also pushing for deregulation or seeking new technology which could solve the present problems.[87]Official aviation agencies and safety boards are resisting any relaxation of the present safety rules unless and until it can be conclusively shown that it would be safe to do so. There are both technical and social factors which make the issues more complex than a simple discussion of safety versus hazard.[88]While walking
![](https://upload.wikimedia.org/wikipedia/commons/thumb/f/fd/Crowd_of_people_with_phones.jpg/220px-Crowd_of_people_with_phones.jpg)
In 2010, an estimated 1500 pedestrians were injured in the US while using a cellphone and some jurisdictions have attempted to ban pedestrians from using their cellphones.[89][90]Other countries, such as China and the Netherlands, have introduced special lanes for smartphone users to help direct and manage them.[91][92]
In prisons
In hospitals
As of 2007, some hospitals had banned mobile devices due to acommon misconceptionthat their use would create significantelectromagnetic interference.[95][96]
Health effects
Screen time,the amount of time using a device with a screen, has become an issue for mobile phones since the adaptation of smartphones.[97]Research is being conducted to show the correlation between screen time and the mental and physical harm in child development.[98]To prevent harm, some parents and even governments have placed restrictions on its usage.[99][100]
There have been rumors that mobile phone use can cause cancer, but this is a myth.[101]
While there are rumors of mobile phones causing cancer, there was a study conducted by International Agency for Research on Cancer (IARC) that stated the there could be an increase risk of brain tumors with the use of smartphones, this is not confirmed. They also stated that with the lack of data for the research and the usage periods of 15 years will warrant further research for smartphones and the cause of brain tumors.[102]
Educational impact
A study by theLondon School of Economicsfound that banning mobile phones in schools could increase pupils' academic performance, providing benefits equal to one extra week of schooling per year.[103]
Culture and popularity
Mobile phones are considered an important human invention as it has been one of the most widely used and sold pieces of consumer technology.[7][9]They have also become culturally symbolic. InJapanese mobile phone culturefor example, mobile phones are often decorated with charms. They have also become fashion symbols at times.[104]TheMotorola Razr V3andLG Chocolateare two examples of devices that were popular for being fashionable while not necessarily focusing on the original purpose of mobile phones, i.e. a device to provide mobile telephony.[105]
Some have also suggested that mobile phones or smartphones are astatus symbol.[106]For example a research paper suggested that owning specifically anApple iPhonewas seen to be a status symbol.[107]
Text messaging,which are performed on mobile phones, has also led to the creation of 'SMS language'. It also led to the growing popularity ofemojis.[108]
See also
- Camera phone
- Cellular frequencies
- Customer proprietary network information
- Field telephone
- List of countries by number of mobile phones in use
- Mobile broadband
- Mobile Internet device(MID)
- Mobile phone accessories
- Mobile phones on aircraft
- Mobile phone use in schools
- Mobile technology
- Mobile telephony
- Mobile phone form factor
- Optical head-mounted display
- OpenBTS
- Pager
- Personal digital assistant
- Personal Handy-phone System
- Prepaid mobile phone
- Two-way radio
- Push-button telephone
- Radiotelephone
- Rechargeable battery
- Smombie
- Surveillance
- Tethering
- VoIP phone
Notes
- ^Also known as acellular phone,hand phoneorpocket phone,and sometimes shortened to simplymobileor justphone.
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Further reading
- Agar, Jon,Constant Touch: A Global History of the Mobile Phone,2004ISBN1-84046-541-7
- Fessenden, R. A. (1908)."Wireless Telephony".Annual Report of the Board of Regents of the Smithsonian Institution.The Institution:161–196.Retrieved7 August2009.
- Glotz, Peter & Bertsch, Stefan, eds.Thumb Culture: The Meaning of Mobile Phones for Society,2005
- Goggin, Gerard,Global Mobile Media(New York: Routledge, 2011), p. 176.ISBN978-0-415-46918-0
- Jain, S. Lochlann (2002)."Urban Errands: The Means of Mobility".Journal of Consumer Culture.2:385–404.doi:10.1177/146954050200200305.S2CID145577892.
- Katz, James E. & Aakhus, Mark, eds.Perpetual Contact: Mobile Communication, Private Talk, Public Performance,2002
- Kavoori, Anandam & Arceneaux, Noah, eds.The Cell Phone Reader: Essays in Social Transformation,2006
- Kennedy, Pagan.Who Made That Cellphone?Archived4 November 2017 at theWayback Machine,The New York Times,15 March 2013, p. MM19
- Kopomaa, Timo.The City in Your Pocket,Gaudeamus 2000
- Levinson, Paul,Cellphone: The Story of the World's Most Mobile Medium, and How It Has Transformed Everything!,2004ISBN1-4039-6041-0
- Ling, Rich,The Mobile Connection: the Cell Phone's Impact on Society,2004ISBN1-55860-936-9
- Ling, Rich and Pedersen, Per, eds.Mobile Communications: Re-negotiation of the Social Sphere,2005ISBN1-85233-931-4
- Home page of Rich Ling
- Nyíri, Kristóf, ed.Mobile Communication: Essays on Cognition and Community,2003
- Nyíri, Kristóf, ed.Mobile Learning: Essays on Philosophy, Psychology and Education,2003
- Nyíri, Kristóf, ed.Mobile Democracy: Essays on Society, Self and Politics,2003
- Nyíri, Kristóf, ed.A Sense of Place: The Global and the Local in Mobile Communication,2005
- Nyíri, Kristóf, ed.Mobile Understanding: The Epistemology of Ubiquitous Communication,2006
- Plant, Sadie,on the mobile – the effects of mobile telephones on social and individual life,2001
- Rheingold, Howard,Smart Mobs: The Next Social Revolution,2002ISBN0-7382-0861-2
- Singh, Rohit (April 2009).Mobile phones for development and profit: a win-win scenario(PDF).Overseas Development Institute. p. 2. Archived fromthe original(PDF)on 16 April 2009.Retrieved5 April2009.
External links
![](https://upload.wikimedia.org/wikipedia/commons/thumb/d/dd/Wikivoyage-Logo-v3-icon.svg/40px-Wikivoyage-Logo-v3-icon.svg.png)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/9/99/Wiktionary-logo-en-v2.svg/40px-Wiktionary-logo-en-v2.svg.png)
![](https://upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png)
- "How Cell Phones Work"atHowStuffWorks
- "The Long Odyssey of the Cell Phone",15 photos with captions fromTimemagazine
- Cell Phone, the ring heard around the world– a video documentary by theCanadian Broadcasting Corporation