Mobile network not available

mibast

I have had issues with the network connection for calls and sms. Mobile data works continously, but calls and sms suddenly doesn't come through, out or in. Restarting the phone works 9.8/10 times. When this happens noone can call me or send me texts, but I have full 5G data. My texts doesn't go out, and when I try to call out, no connection is made. Just a message saying "Mobile network not available". I have experienced issues with my carrier (ice.no, Norway) on my old android phone, but not as often as after I switched. They can't do anything other than tell me to reset APN. Should I switch carrier, or could it be a GrapheneOS issue?

xbxbz

mibast

Try this and check if this solves your problem

Settings > System > Reset options > Reset Mobile Network Settings > Reset settings

finally reboot.

Novalissoide

mibast have full 5G data

Try 4G only. Also better for battery.

Datasapiens

Try disabling 2g network protection

mibast

Datasapiens It is disabled and has been since last time I did an investigation round.

Novalissoide

mibast is disabled and has been since last time I did an investigation round

Since the issue persists, you should re-enable that protection.

mibast

xbxbz Try this and check if this solves your problem

Settings > System > Reset options > Reset Mobile Network Settings > Reset settings

finally reboot.

Did this, still not stable connection (at least every 2nd day the connection locks up and stops)

Novalissoide Since the issue persists, you should re-enable that protection.

Done as well. Still not helping

Johnnyloans

mibast

Greetings! Thank you for the info, very helpful.

It would be interesting to know if a simple:
airplane mode on > wait 30 seconds > airplane mode off
resolves your SMS/call issue.

What are the defaults for all options under:
Settings > SIMs > [your carrier ice.no] > carrier settings overrides

It'll say something like:

VoLTE / Vo4G Availability
No override (Default: Available)

"Default: Available" is its current state.
What is the default for:

VoLTE
VoNR
5G capabilities
Wifi Calling

override these to off then override to on.

Go back one menu to your SIM settings.
Toggle VoLTE on in this menu as well.
It could prove useful to test this out for a bit: preferred network type = LTE only

Lastly, I think this is probably an issue with the carrier:

When you call the carrier, mention your data works but texting and voice often fails until you reboot the phone.
At the bottom of your SIM settings > Access point names. Confirm these entries are correct with your carrier.
SIM settings > carrier settings version This should hopefully be dated around 5/2025 - 12/2025 . Confirm these with your carrier if you wish. (Our last AOSP update is from 12/2025 so we won't have anything newer.)
Ask your carrier if there are any errors or concerns with VoLTE, VoNR, or IMS. anything in the logs?
Ask your carrier to reprovision your SIM/line. Reset and check any settings for Calling or texting.
If you don't have it already, obtaining a physical SIM could help--don't use the esim. See if that helps. If you go with a psychical SIM, maybe skip some of those previous steps to not have them do it then you decide you're throwing away the esim lol.

Bring us back some good news mate :)

mibast

Johnnyloans

I will try the airplane mode next time I fall out of service (as this is not something that happens within a set time).

Carrier settings overrides:
Enable overrides slider: off
VoLTE / Vo4G availability: No override (Default: Available)
VoNR / Vo5G availability: No override (Default: Unavailable)
5G capabilities: No override (Default: NSA)
Wi-Fi calling availability: No override (Default: Available)
Cross SIM calling / backup calling availability: No override (Default: Available)

VoLTE on (tried off, but alas, still fell out)
Preferred network: 5G (have tried 4G previously, but alas, stil fell out)

Access point names are correct and last version is 2025-11-12

I have been in contact with the carrier several times. They hint of some changes made to the infrastructure last summer, and I know they have some issues related to the antenna/system setup after progressing to 5G. After talking to support, I have switched to eSIM and back, then after experiencing the same, I have replaced the SIM card with a new. Initially and currently using SIM. The problem is: there is no clear answer from the carrier that makes me sure where the issue lays, and the answers/support I get varies from person to person. Last person says they cannot debug other systems than google android or ios.

I'm quite happy with my carrier, but I'm suspicious that the issue lays with them. So if I can verify that there are no known GOS software/app issues, I will switch.

mibast

Johnnyloans
Airplane mode did not solve the disconnection. Restarted phone twice without gaining connection for anything else than data. Had toggled off my VoLTE, so will try again with this on. 40 km and a restart later, the phone gained consciousness again. Dumped the phone app log into files while not connected and error message was displayed in the phone app. Will look through them to see if there is any hint of what is going on, but not holding my breath.

Johnnyloans

mibast

Maybe it'll say something. Earlier about logs, I meant any history seen on your cell carrier's side.