4G is the short name for fourth-generation
wireless, the stage of broadband mobile communications that will supercede the
third generation (3G ).Carriers that use orthogonal frequency-division multiplexing (OFDM) instead of time division multiple access (TDMA) or code division multiple access (CDMA) are increasingly marketing their services as being 4G, even when
their data speeds are not as fast as the International Telecommunication
Union (ITU) specifies.
According to
the ITU, a 4G network requires a mobile device to be able to exchange data at
100 Mb/sec. A 3G network, on the other hand, can offer data speeds as slow as
3.84 Mb/sec.
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