David Malka
Member
Found the workaround. I was the told the same thing by AT&T but here's what I did and it works now on my unlocked T-Mobile model. I inserted my SIM in my friends AT&T iPhone 6s Plus and activated WIFI Calling. Then I put the SIM back in my T-Mobile Unlocked phone and when I turned Wifi Calling on it asked me to confirm and now it's working. I am using AT&T Wifi Calling on a T-Mobile unlocked phone.
It doesn't. I had an unlocked T-Mobile model and it didn't work. I stopped by the Apple Store and swapped it out for an ATT model and now wifi calling is working for me.
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