How to enable VOLTE on my OnePlus 8T?
Settings > Wi-Fi & Network > SIM & Network > SIM # > Enable VoLTE when available.
I have check with my carrier and they do support VOLTE on OnePlus 8T, however, i couldn't see the option to enable VOLTE under the sim# tab.
Tap on "SIM 1".
I have reach out to OnePlus support and they are working on a solution
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by Soojin P., 2022-05-24