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Mobile phone Wikipedia

Former systems would cover a service area with one or two powerful base stations with a range of up to tens of kilometers’ (miles), using only a few sets of radio channels (frequencies). The race to create truly portable telephone devices began after World War II, with developments taking place in many countries. In addition, they enable multimedia playback and streaming, including video gtspins casino content, as well as radio and television streaming. These include text messaging, multimedia messaging, email, and internet access (via LTE, 5G NR or Wi-Fi), as well as short-range wireless technologies like Bluetooth, infrared, and ultra-wideband (UWB). This radio frequency link connects to the switching systems of a mobile phone operator, providing access to the public switched telephone network (PSTN).
Although these phones are intended to prevent immodesty, some vendors report good sales to adults who prefer the simplicity of the devices; other Orthodox Jews question the need for them. In the UK and US, law enforcement and intelligence services use mobile phones to perform surveillance operations. Some mobile phones can make mobile payments via direct mobile billing schemes, or through contactless payments if the phone and the point of sale support near field communication (NFC). Eventually, the idea spread and in 1999, the Philippines launched the country’s first commercial mobile payments systems with mobile operators Globe and Smart.citation needed Recently, unique content for mobile phones has been emerging, from ringtones and ringback tones to mobisodes, video content that has been produced exclusively for mobile phones.citation needed
Some audio-quality enhancing features, such as Voice over LTE and HD Voice, have appeared and are often available on newer smartphones. Liquid-crystal displays are the most common; others are IPS, LED, OLED, and AMOLED displays. Screen sizes are often measured in diagonal inches or millimeters; feature phones generally have screen sizes below 90 millimetres (3.5 in).

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• In 1979, Nippon Telegraph and Telephone (NTT) launched the world’s first cellular network in Japan.
• In addition, they enable multimedia playback and streaming, including video content, as well as radio and television streaming.
• Some mobile phones can make mobile payments via direct mobile billing schemes, or through contactless payments if the phone and the point of sale support near field communication (NFC).
• A mobile app is a computer program designed to run on a mobile device, such as a smartphone.
• The cell towers are usually interconnected to each other and the phone network and the internet by wired connections.
• The race to create truly portable telephone devices began after World War II, with developments taking place in many countries.

Mobile phones are considered an important human invention as it has been one of the most widely used and sold pieces of consumer technology. A study by the London School of Economics found that banning mobile phones in schools could increase pupils’ academic performance, providing benefits equal to one extra week of schooling per year. 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. In most jurisdictions, prison inmates are forbidden from possessing mobile phones due to their ability to communicate with the outside world and other security issues. Other countries, such as China and the Netherlands, have introduced special lanes for smartphone users to help direct and manage them. 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.

• Many states in the United States have banned texting on cell phones while driving.
• Former systems would cover a service area with one or two powerful base stations with a range of up to tens of kilometers’ (miles), using only a few sets of radio channels (frequencies).
• 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.
• 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 dataset contains information on 22 dichotomous, continuous or categorical variables including, for example, activities regulated (e.g., texting versus talking, hands-free versus handheld), targeted populations, and exemptions.
• In Israel, similar phones to kosher phones with restricted features exist to observe the sabbath; 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.

In the U.S., the Federal Communications Commission (FCC) regulations prohibit the use of mobile phones aboard aircraft in flight. The dataset contains information on 22 dichotomous, continuous or categorical variables including, for example, activities regulated (e.g., texting versus talking, hands-free versus handheld), targeted populations, and exemptions. Many states in the United States have banned texting on cell phones while driving. 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. 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. 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, GPS or satnav.

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In 2001, the third-generation (3G) was launched in Japan by NTT DoCoMo on the WCDMA standard. Cooper made the first ever call on a cell phone when he called Joel S. Engel, a rival of his who worked for AT&T, saying, “I’m calling you on a cell phone, but a real cell phone, a personal, handheld, portable cell phone.” A major breakthrough came in 1973, when the first handheld cellular mobile phone was demonstrated by John F. Mitchell and Martin Cooper of Motorola, using a handset weighing 2 kilograms (4.4 lb).
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. China has proposed using this technology to track the commuting patterns of Beijing city residents. Enabling contactless payments through NFC-equipped mobile phones requires the co-operation of manufacturers, network operators, and retail merchants. A pilot project in Bali was launched in 2011 by the International Finance Corporation and an Indonesian bank, Bank Mandiri. Soon afterwards, other media content appeared, such as news, video games, jokes, horoscopes, TV content and advertising. 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.

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Smartphones are defined by their advanced computing capabilities, which include internet connectivity and access to a wide range of applications. Mobile phone technology has progressed significantly since its origins, evolving from large car-mounted systems to compact, handheld devices. Furthermore, mobile phones offer satellite-based services, such as navigation and messaging, as well as business applications and payment solutions (via scanning QR codes or near-field communication (NFC)). The Motorola Razr V3 and LG Chocolate are 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. Screen time, the amount of time using a device with a screen, has become an issue for mobile phones since the adaptation of smartphones. As of 2007, some hospitals had banned mobile devices due to a common misconception that their use would create significant electromagnetic interference.

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Beyond traditional voice communication, digital mobile phones have evolved to support a wide range of additional services. Contrary to popular misconception, the Federal Aviation Administration (FAA) does not actually prohibit the use of personal electronic devices (including cell phones) on aircraft. By contrast, smartphones generally use a mobile operating system that often shares common traits across devices.
SIM and R-UIM cards may be mixed together to allow both GSM and CDMA networks to be accessed. A hybrid mobile phone can hold up to four SIM cards, with a phone having a different device identifier for each SIM Card. 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 a SIM lock. 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. Most modern mobile phones use lithium-ion (Li-ion) batteries, which are designed to endure between 500 and 2,500 charge cycles. The typical lifespan of a mobile phone battery is approximately two to three years, although this varies based on usage patterns, environmental conditions, and overall care.
In February 2014, 93% of mobile developers were targeting smartphones first for mobile app development. Up until that point, smartphone application distribution depended on third-party sources providing applications for multiple platforms, such as GetJar, Handango, Handmark, and PocketGear. The introduction of Apple’s App Store for the iPhone and iPod Touch in July 2008 popularized manufacturer-hosted online distribution for third-party applications (software and computer programs) focused on a single platform. A mobile app is a computer program designed to run on a mobile device, such as a smartphone. Of the two, Android has been the best-selling system worldwide on smartphones since 2011, and as of March 2025, Android had 71.9% of the overall market share, while iOS had 27.7%.