资讯

Nearly a decade ago, Verizon informed customers that it would be shutting down its 2G and 3G CDMA networks by 2021. At the time, the carrier was still in the process of switching to 4G LTE ...
AST SpaceMobile is busy rapidly expanding its space-based cellular network, but it's not your typical 3G/4G connection ... both AT&T and Verizon plan to use for commercial services with their ...