美国5G联络图

The "G" in 5G doesn''t stand for gigahertz or gigabit. It stands for "generation". It''s a global standard developed mostly in Europe. Here is a brief timeline of standards:Pre-1G: the MTS, or Mobile Telephone System. Built in the late 1940''s. It sucked, and you can ask me why.

1G: the analog AMPs system, the first true cellular system, developed in thelate 70''s, first deployed in Chicago in 1984.

2G: CDMA/GSM3G: EVDO/HSDPA4G: LTE/WiMAX (WiMAX mostly defunct)

As for health effects, no health testing has been done, at least that I haveheard/seen. Regulation of the radio deployments is forbidden at the state/local level under the 1996 Telecom Act.

--来到这世上，我就没打算活着回去！