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Cell Global Identity (CGI) is a globally unique identifier for a Base Transceiver Station in mobile phone networks. [1] It consists of four parts: Mobile Country Code (MCC), Mobile Network Code (MNC), Location Area Code (LAC) and Cell Identification (CI). It is an integral part of 3GPP specifications for mobile networks, for example, for ...
e. A cellular network or mobile network is a telecommunications network where the link to and from end nodes is wireless and the network is distributed over land areas called cells, each served by at least one fixed-location transceiver (such as a base station). These base stations provide the cell with the network coverage which can be used ...
Cellular Abroad is a mobile virtual network operator and internet retailer based in Los Angeles that uses GSM technology to provide international wireless voice, messaging and data services. Cellular Abroad sells and rents unlocked international GSM cell phones, portable WiFi hotspots and SIM Cards under the National Geographic Society brand.
In 3G, the most prevalent technology was UMTS with CDMA-2000 in close contention. All radio access technologies have to solve the same problems: to divide the finite RF spectrum among multiple users as efficiently as possible. GSM uses TDMA and FDMA for user and cell separation. UMTS, IS-95 and CDMA-2000 use CDMA.
For a more comprehensive list of mobile phone operators, see Mobile country codes. Terrestrial This is a list of the world's thirty largest terrestrial mobile phone ...
A coverage noticer is a device that beeps (or vibrates) when in a zone that lacks coverage (white spot). This is fundamental for critical services (security, emergency and so on). When the user goes to a covered area, the noticer ceases beeping. Similarly coverage maps are often used to visualize coverage, these are produced by networks ...
Website. uscellular.com. United States Cellular Corporation (doing business as UScellular and formerly known as U.S. Cellular) is an American mobile network operator. Its stock is publicly traded, but Telephone and Data Systems Inc. owns a controlling stake (83% economic and 96% voting power). The company was formed in 1983 and is headquartered ...
A mobile phone or cell phone[ a ] is a portable telephone that can make and receive calls over a radio frequency link 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 a mobile phone operator, which ...
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