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2019-02-21 12:02 PM
I just noticed optus already enable VoLTE function.
I am currently holding a HUAWEI Mate 9, this is a mainland China version.
EMUI version: 9.0.1
It supports VoLTE when using China Mobile Network in mainland China.
Now I can just get 4G+ sign but VoLTE is not enabled.
Consider if any possibility that I can use VoLTE function without switching to a new mobile phone.
2019-02-21 02:03 PM
Optus specify that you must purchase the phone from Optus for VoLTE and VoWiFi to work so it won't work for yours unfortunately.
I do not represent Optus. The views, opinions and advice expressed in my posts are my own