Phone calls stopped working entirely a few updates ago

ottoptj

Hello,

Phone calls have stopped working on my Pixel 8a a few updates ago. When I try to make a call, the caller screen shows up with only the call recording button for a second and then closes pretty much immediately. I'm unsure whether it's due to Android 16, the RTT update or the update that moved the RTT button. I first noticed this issue after the update that moved the RTT button to the end (2025071900).

The issue happens with both, my physical sim and my esim from different countries (one in roaming and the other in the current country).

Has anyone else experienced a similar issue?

de0u

ottoptj Have you tried these suggestions? https://grapheneos.org/usage#carrier-functionality

ottoptj

de0u At least resetting network settings did not help.

ottoptj

Also, to clarify, SMS and mobile data work just fine (well, as well as the local carriers are, which is not good). The issue is with calls specifically.

de0u

ottoptj Is 2G calling enabled or disabled?

Also, it is plausible that you'll get more help here if you are in a position to identify the carriers, also which country you're in now.

ottoptj

de0u The issue appears regardless of whether it's enabled or disabled.

Not going to mention the specific carriers, but I am in Ireland.

de0u

ottoptj Not going to mention the specific carriers, but I am in Ireland.

Ok, maybe somebody with experience roaming into Ireland will weigh in. But it's possible that the issue is related to your home carriers, so without that information it might not be possible for people to help.

ottoptj

de0u Also to clarify one of my sims is roaming into Ireland. The other one is a local Irish one.

calls_not_working

Hi everyone,

Hope this helps someone. I recently purchased Pixel 10 and restored Seedvault backup from my old pixel 6, and then inserted my physical SIM. Everything worked well except calls - attempts to make any call resulted in "Call ended" after 1 sec.

I knew that factory reset would most likely help but didn't want to go this route - as it doesn't really help finding the actual issue. Instead I spent a week debugging this and made the following discovery:

When seedvault restores apps (including system ones), it automatically drops network permissions for them. One of these system apps is IMSService - system service that handles VoLTE, VoWiFi, and RCS communications on Android devices.

Restoring network permissions for ImsService app (Settings -> Security & Privacy -> Privacy controls -> Permission Manager -> Network (Toggle "Show System" in the top right corner) -> ImsService -> Network -> Allow.) fixes everything immediately.

Novalissoide

calls_not_working thank you very much for this report. Not the easiest, or most obvious observation to do I'd say. 👍🏾

calls_not_working

Novalissoide you're most welcome. In my opinion this should be added straight to https://grapheneos.org/usage#carrier-functionality, but not sure who to ask to update the doc.

Novalissoide

calls_not_working if you want to, I could open an entry in the issue tracker about it.

ZoraIsHere

Massive respect!