AT&T walks back promise to support 3.45GHz on older phones Posted on September 16, 2022 By Charlielikes As Ars Technica recounts, AT&T last month told CNET that it would be releasing a software update to allow select “older” handsets to leverage its newly acquired 3.45GHz C-band spectrum. Tech Tags:‘back, ‘to, 3.45ghz, at&t, older, on, phones, promise, support, tech, technology, walks