|T-Mobile CEO John Legere and other executives have clarified the carrier's policy on data throttling and Wi-Fi Calling in the wake of the company's iPhone announcement. During a Q&A session, they stated that throttling measures will only drop users to 3G speeds if they're on a fixed plan and exceed their data caps. Anyone on an unlimited data plan will be able to continue at full speed, as long as they aren't interfering with other customers.
Legere described the arrangement as a "fair use" policy aimed at keeping T-Mobile's network open to more customers; together the executives commented that T-Mobile already has customers who use large amounts of data without being throttled, in some cases over 50GB per month, but the extreme examples are typically taking place at times that aren't affecting other customers. "If there is ever a case where we're going to use a fair use policy, we're going to post it so you can have a look at it," added Legere. "It's not a number — if someone is having a party at 3AM, I don't really care."
T-Mobile marketing officer Mike Sievert has separately told Engadget that the iPhone 5 won't support the carrier's Wi-Fi Calling feature, at least not at launch. The company "loves its Wi-Fi Calling feature, and I'll have to leave it at that," according to Sievert. The option lets people outside the US receive calls from a US phone number so long as they're connected to a Wi-Fi hotspot. Several Android phones on T-Mobile already support the technology.