VoLte support for AT&T customers

[dontworryok888]

AT&T will shut down 3g in February 2022. To use their 4g and 5g, the phones need to support VoLte. Unfortunately, the new Zenfone8 does not seem to support VoLte over the AT&T network. (If it does, please provide setting guideline)

[dontworryok888]

I can not even use 4G. It keep saying I need to register VoLte.