In under three months, AT&T upgraded its cellular network to handle the wireless spectrum purchased from EchoStar.

AT&T announced Monday that it has improved 5G performance across its network in the continental United States by activating ...

Marguerite Reardon started as a CNET News reporter in 2004, covering cellphone services, broadband, citywide Wi-Fi, the Net neutrality debate and the consolidation of the phone companies. It's a good ...