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WiFi calling is a network-dependent feature that must be enabled by the carrier. Please contact your service provider for additional details.
Sorry, there was a problem. Please try again later.I can't give any specifics for AT&T but both wi-fi calling and voice over LTE work on T-Mobile. In the past wi-fi calling on T-Mobile required the T-Mobile version of the phone and I'm not sure if that has changed.
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