elverdiblanco
Member
- Jun 12, 2018
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Either way, it's a carrier issue and not a phone or software issue. It's up to carriers to decide if they want to allow unlocked phones to benefit from all services. I had VoLTE from AT&T on my 10, but it's not on my U12. T-Mobile on the other hand allows unlocked phones to use both VoLTE and Wi-Fi calling.
The carrier I use allows Wi-Fi calling from unlocked phones including the HTC 10 and U11. Posts elsewhere indicate it works with the OnePlus 6 as well even though that is a phone they neither sell or officially support. On your U12 are the Wi-Fi calling options not present or present but greyed out? On mine they're hot present anywhere in the phone settings.