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uscellular.com. United States Cellular Corporation(doing business asUScellularand 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 in Chicago ...
Bring your own device (BYOD / ˌ b iː w aɪ oʊ ˈ d iː / [1]) (also called bring your own technology (BYOT), bring your own phone (BYOP), and bring your own personal computer (BYOPC)) refers to being allowed to use one's personally owned device, rather than being required to use an officially provided device.
GSM uses TDMA and FDMA for user and cell separation. UMTS, IS-95 and CDMA-2000 use CDMA. WiMAX and LTE use OFDM. Time-division multiple access (TDMA) provides multiuser access by chopping up the channel into sequential time slices. Each user of the channel takes turns to transmit and receive signals.
The main LTE bands are in bold print. Not yet deployed are not available (N/A). Partial deployments varies from country to country and the details are available at List of LTE networks. Networks on LTE bands 7, 28 (LTE-FDD) are suitable for global roaming in ITU Regions 1, 2 and 3. Networks on LTE bands 1, 3 (LTE-FDD) are suitable for roaming ...
The Cellular band occupies 824–849 MHz and 869–894 MHz ranges. To issue cellular licenses, the FCC divided the U.S. into 734 geographic markets called Cellular Market Areas (CMAs) and divided the 40 MHz of spectrum into two, 20 MHz amounts referred to as channel blocks; channel block A and channel block B.
Mobile virtual network operators (MVNOs) in the United States lease wireless telephone and data service from the four major cellular carriers in the country—AT&T Mobility, Boost Mobile, T-Mobile US, and Verizon—and offer various levels of free and/or paid talk, text and data services to their customers.
AT&T, T-Mobile, Verizon, Boost Mobile, and UScellular also sell SIM cards through their retail channels, both in-store and online. The top five wireless providers operate nationwide wireless networks which cover most of the population in the United States, while smaller carriers provide native network coverage across selected regions of the ...
Drive testing. RF Drive testing is a method of measuring and assessing the coverage, capacity and Quality of Service (QoS) of a mobile radio network. The technique consists of using a motor vehicle containing mobile radio network air interface measurement equipment that can detect and record a wide variety of the physical and virtual parameters ...