The Global System for Mobile Communications (GSM) is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second-generation (2G) digital cellular networks used by mobile devices such as mobile phones and tablets. GSM is also a trade mark owned by the GSM Association. GSM may also refer to the Full Rate voice codec.
Integrated Digital Enhanced Network (iDEN) is a mobile telecommunications technology, developed by Motorola, which provides its users the benefits of a trunked radio and a cellular telephone. It was called the first mobile social network by many technology industry analysts. iDEN places more users in a given spectral space, compared to analog cellular and two-way radio systems, by using speech compression and time-division multiple access (TDMA).
A SIM card is an integrated circuit (IC) intended to securely store an international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephone devices. Technically the actual physical card is known as a universal integrated circuit card (UICC); this smart card is usually made of PVC with embedded contacts and semiconductors, with the SIM as its primary component. In practice the term "SIM card" refers to the entire unit and not simply the IC.
A SIM lock, simlock, network lock, carrier lock or (master) subsidy lock is a technical restriction built into GSM and CDMA mobile phones by mobile phone manufacturers for use by service providers to restrict the use of these phones to specific countries and/or networks. This is in contrast to a phone that does not impose any SIM restrictions.
The International Mobile Equipment Identity (IMEI) is a numeric identifier, usually unique, for 3GPP and iDEN mobile phones, as well as some satellite phones. It is usually found printed inside the battery compartment of the phone but can also be displayed on-screen on most phones by entering the MMI Supplementary Service code *#06# on the dialpad, or alongside other system information in the settings menu on smartphone operating systems.
Unstructured Supplementary Service Data (USSD), sometimes referred to as "quick codes" or "feature codes", is a communications protocol used by GSM cellular telephones to communicate with the mobile network operator's computers. USSD can be used for WAP browsing, prepaid callback service, mobile-money services, location-based content services, menu-based information services, and as part of configuring the phone on the network. The service does not require a messaging app, and does not incur charges.
A prepaid mobile device, also known as a pay-as-you-go (PAYG), pay-as-you-talk, pay and go, go-phone, prepay or burner phone, is a mobile device such as a phone for which credit is purchased in advance of service use. The purchased credit is used to pay for telecommunications services at the point the service is accessed or consumed. If there is no credit, then access is denied by the cellular network or Intelligent Network. Users can top up their credit at any time using a variety of payment mechanisms.
TracFone Wireless, Inc. (TFWI) is an American prepaid, no-contract mobile phone provider. TFWI is a subsidiary of Verizon Communications, and offers products and services under several brands. It operates as a mobile virtual network operator (MVNO), holding agreements with the three largest United States wireless network operators to provide service: AT&T Mobility, T-Mobile US, and Verizon.
Alltel was a landline, wireless and general telecommunications services provider, primarily based in the United States. Before its wireless division was acquired by Verizon Wireless and AT&T, Alltel provided cellular service to 34 states and had approximately 13 million subscribers. As a regulatory condition of the acquisition by Verizon, a small portion of Alltel was spun off and continued to operate under the same name in six states, mostly in rural areas. Following the merger, Alltel remained the ninth largest wireless telecommunications company in the United States, with approximately 800,000 customers. On January 22, 2013, AT&T announced they were acquiring what remained of Alltel from Atlantic Tele-Network for $780 million in cash.
A mobile phone feature is a capability, service, or application that a mobile phone offers to its users. Mobile phones are often referred to as feature phones, and offer basic telephony. Handsets with more advanced computing ability through the use of native code try to differentiate their own products by implementing additional functions to make them more attractive to consumers. This has led to great innovation in mobile phone development over the past 20 years.
Sprint Corporation was an American telecommunications company. Before being acquired by T-Mobile US on April 1, 2020, it was the fourth-largest mobile network operator in the United States, serving 54.3 million customers as of June 30, 2019. The company also offered wireless voice, messaging, and broadband services through its various subsidiaries under the Boost Mobile and Open Mobile brands and wholesale access to its wireless networks to mobile virtual network operators.
The Motorola RAZR V3, popularly called simply the Razr, is a clamshell style cell phone developed by Motorola and initially released in November 2004, the first device using the RAZR moniker. With its unique and then-thin aluminium body, coupled with a high price, the RAZR V3 was initially positioned as a desirable premium phone; following price reductions, it then became extremely successful. In the United States the V3 was the most popular cell phone in 2005, 2006 and 2007 and remained best-selling until November 2008.
Cricket Wireless is an American prepaid wireless service provider, owned by AT&T. It provides wireless services to ten million subscribers in the United States. Cricket Wireless was founded in March 1999 by Leap Wireless International. AT&T acquired Leap Wireless International in March 2014, and later merged Cricket Wireless operations with Aio Wireless. Cricket Wireless competes primarily against T-Mobile's Metro by T-Mobile, Dish's Boost Mobile and Verizon's Visible in the prepaid wireless segment.
The Motorola StarTAC, first released on January 3, 1996, is often assumed to be the first ever clamshell (flip) mobile phone. Technically, however, NEC had been releasing flip phones on NTT Docomo's PDC Mova network long before 1996, namely the TZ-804 and TZ-1501, both respectively launched in 1991 and late 1994. Another early precursor of this form factor was the Grillo, which was designed in Italy by Richard Sapper and Marco Zanuso in 1965. The StarTAC is the successor of the MicroTAC, a semi-clamshell design first launched in 1989. Whereas the MicroTAC's flip folded down from below the keypad, the StarTAC folded up from above the display. In 2005, PC World named the StarTAC as the 6th Greatest Gadget of the Past 50 Years. The StarTAC was among the first mobile phones to gain widespread consumer adoption; approximately 60 million StarTACs were sold.
The Motorola E815 is a clamshell mobile phone that is the successor to the V710. It includes the following features:
The BlackBerry Pearl was a series of smartphones developed by Research In Motion, and was the first BlackBerry device with a camera and media player. It was originally released on September 12, 2006. T-Mobile was the first US carrier to release the phone as a carrier device. The last BlackBerry Pearl released was the 9100 series on May 13, 2010. After this model was cleared out, RIM discontinued the Pearl series.
The term box breaker pertains to the mobile phone industry; where there are companies or individuals that exploit the networks' use of discounts on handsets to create their own profitable business.
The Cell Phone Freedom Act was a private member's bill proposed twice to the Parliament of Canada which would have required mobile phone providers remove the SIM lock from devices once a customer reaches the end of their contract.