ZenFone 6 will not make or receive calls

[grantmiller22]

My ZenFone 6 (AT&T USA) will not make or receive calls. Texts work fine. The phone updated to Android 10 last week and I was able to make calls. I turned wifi off and was able to make one call but now it doesn't call or get calls no matter what I do.
I restarted the phone multiple times and reset wifi,mobile,& bluetooth via Reset options, this did nothing.
The phone is not in Airplane mode.
Firmware version is: 17.1810.2009.176
The phone is not rooted

[Anders_ASUS]

grantmiller22

Started working correctly again out of the blue, 20+ hours of not being able to make or receive calls then poof it works again... so strange.

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If it stops working again, then please factory reset and if no improvement, contact your local support.
Thanks!

[Anders_ASUS]

mukesh.badgujar.in

https://zentalk.asus.com/en/discussion/35556/zenfone-6-will-not-make-or-receive-calls

yes ZenFone 6  Itself a Big Problem, ASUS Cant Solve any problem. My problem about Network is also not solved but they created more problems in mobile... WTF... Asus.

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No need to project the service issues you've had in other threads with different issues. We know about your situation and we will solve it. Just talk to ARP_ASUS and I'm sure you will work it out.
Thank you for your understanding