[Update] With further research, I solved the issue by turning on VoLTE on Zenfone 8. For Zenfone 5Q however, the feature of turning on VoLTE is blocked by AT&T. For some reason, AT&T decided to block the older (3 yrs old) phones, even though it's st...
Hi@WiLd256 How did you installed the newest firm update? Many Zenfone users with AT&T have the same issue, including me. Neither AT&T nor ASUS support is helpful.
Yes, you're not the only one. My carrier is AT&T. Both Zenfone I have, Zenfone 8 and Zenfone 5Q can't make any call neither receive phone call today! Is there any solution we can work around it?