I've searched the forum but I can't find an answer.
I want a dual SIM Key2, but I also need VoLTE. I'm wondering if anyone is using a dual sim model in the US, and can confirm that VoLTE works, on T-Mobile or on any other US carrier.
the issue with T-mobile and VoLTE is validation with E-911 emergency service. It's doubtful that OEMs would think to work with Tmobile USA to validate international models for E-911, maybe Samsung/Apple would be the exception.
it may work on the dual-sim keytwo. haven't gotten much confirmation. the dual Sim Keyone wouldn't work as they didn't have the write IMS login information hard-coded in their firmware. I've heard the keytwo might.