Graphene OS intermittently fails to ring for incoming calls

Pixel 6a with Graphene OS user here.
The first time I encountered this issue was actually already back in December last year. Suddenly a notification of a missed call, although the phone didn't ring and the call should have gone through. Since I rarely get any calls and didn't notice anything unusual I didn't think much about it. It once happened again in February.

Just now after reading a few fix suggestions, I disabled "4G Calling" (I assume that's what my carrier calls VoLTE). Wi-Fi calling wasn't enabled in the first place. And then I could no longer receive test-calls nor make outgoing calls. But I've been using LTE-only mode and had "Allow 2G" disabled. Only after changing both (I tried changing only either), test-calls worked again normally. I guess this might be expected, but I hadn't given it any thought before.

I've re-enabled "4G Calling" and hope that without LTE-only mode and with "Allow 2G" enabled this issue won't reappear.

I was unable to make calls without VoLTE turned on so decided to re-enable that and WiFi calling. No issues in 2 days.

This happened to me again today. It is frustrating because I don´t receive many calls. The ones I do receive are generally very important and 50% they fail to reach me as I only either get a notification that I missed a call or simply receive an sms telling me that I missed it. The phone was in front of me on my desk the whole day...

https://9to5google.com/2024/04/22/google-pixel-april-update/

It seems to be a upstream bug.

The new update fixed it for me.

Pixel 7 Pro, on 2024042100 which includes the AP1A.240405.002.B1 update from upstream Android.

Still experiencing calls straight to voicemail, but only sometimes. I haven't identified a pattern of which callers work, or don't work.

Things I've tried:

A power-off, remove SIM, wait 2 minutes, reinsert SIM, power-on cycle suggested by my carrier (Telus).

Turning off 5G by setting the option to LTE.
Reset Mobile Networking option.

studog

Ok. My problem seems to have been I had turned on "Do Not Disturb" mode in the phone app.

Coming from an LG G7 Thinq, where DND is an OS-level item that affects all notifications, I had been unable to find the same OS-level DND on my Pixel 7 Pro, and ended up enabling the DND in the phone app when I found it. I thought it would turn off automatically I think, like the OS-level version.

This explains why things sometimes worked and sometimes didn't; certain contacts are starred and certain aren't.

jagorom515 It doesn't change that these are carrier bugs. New releases of AOSP / stock OS can work around more of them but they are carrier bugs.

GrapheneOS
A Google software update caused the issue
A Google software update fixed the issue

My phone was working fine until March 13
My phone was broken after March 14
My phone was working fine again after April 22

I'm not sure where a carrier bug fits in here sir/mam. It feels like it was more of a modem bug introduced by an UPDATE (March 14) and not a change in my carrier. The Apr 20 update, which had the vendor update to AP1A.240405.002.B1, seems to have fixed that modem bug.

I'm not very tech literate, so please forgive me if we are both talking about the same thing and I am being too dense about it, but it felt like you were denying that the March Google Update was not responsible for the issue.

Again to be clear, I am not saying it was a Graphene issue or anything. It clearly was an upstream problem given the amount of non-GOS users facing this issue.
I'm a big fan of all the work you folks do and I love using the OS. Thank you!

jagorom515

You know what they say.

Walks like a duck, quacks like a duck, it’s a carrier issue.

I experienced this 3 times this week. I reset the network settings and didn't touch it since. But today I got 2 calls from same guy. 3 minutes apart. 2nd one was not received. I'm on newest gos version. Pixel 8

brookie229 hi i tried your method, worked with the previous version, 1 week no issues, then updated to 06500 and back to no calls, phone is 8Pro

Same issue for me, clean install pixel 8 pro. I can make calls but when trying to call the phone, no ringing, no notification, nothing, just goes directly to voicemail.

So after trying to get the phone working every which way I knew I ended up returning to stock Google build, tested phone and it worked immediately, flashed lineage, worked immediately and has continued to. Is there an actual known issue that I can keep an eye on the change logs to know if/ when it's fixed?

I've had intermittent issues with incoming calls this month.
Not sure if might be something to do with adding more user profiles or my carrier who recently sent me a new SIM.

New build was released I see, noting in the change logs about phone not working but was wondering if anyone has tried it? My issue was incoming calls wouldn't work at all which is a piety basic requirement for me. If the new build solved the issue I'd love to hear that.

Ducter I don't know for sure, but I'd suspect the issue people are reporting here is an upstream one. It's possible QPR3 has fixed the issue, but I don't know if it has. Only way to find out is to try, but keep in mind alpha/beta releases might have other issues.