No Service/No SIM When Placing Phone Call

[anony11]

Hello everyone, 

I have an ROG Phone 7 with A14 v.90 (US Version bought directly from Asus and using T-Mobile)

I have been experiencing an issue over the past month where my cell service will reset when I place a phone call. When I go to place the call, it will end after ringing once and the status bar icons will indicate "no service" followed by "no sim". Then the cell service will return and I can place the call without issue. After about 15-30 minutes if I try making a call again, the issue will happen again. Also, the issue does not seem to happen when I am using WiFi calling at home. 
@Mattias_ASUS 

@Titan_ASUS 

[Mattias_ASUS]

Hello @anony11 
This does sound pretty odd, I can recommend doing a network settings reset and try to see if that works, you can do that by going to Settings > System > Reset options > Reset Mobile Network Settings. This will clear the settings in case some setting could be causing issues.
Let me know if this solves your issue.

[anony11]

I have already tried that multiple times with no success. I have logs and screen recordings of the issue if you would like me to DM them to you. 

[Mattias_ASUS]

Would you kindly send me the logs? Just DM me and I'll forward them to the devs

[anony11]

So it seems like the issue goes away if I turn off 5G on the phone. My guess would be that the phone is trying to place calls over VoNR and since I don't think the phone supports it (needs confirmation), that causes the call to fail. Is there a plan to add VoNR support to the ROG 7 at some point? Or have the devs found some other cause for the issue?

@Mattias_ASUS