02.10.2015 18:39 Uhr, Quelle: Engadget

AT&T says competitors launched WiFi calling without FCC clearance

While Sprint and T-Mobile have already flipped the switch on WiFi calling for the iPhone, AT&T continues to wait it out on the sidelines. And now we may know why. As reported by The Verge, the carrier recently sent a letter to FCC chairman Tom

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