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4G - Wikipedia, the free encyclopedia
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日期：2026-04-23
A 4G system, in addition to the usual voice and other services of 3G, provides ....
since the first move from 1981 analog (1G) to digital (2G) transmission in 1992. ...
In theory speeds up to 672 Mbit/s is possible, but has not been deployed yet....看更多
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