Problems with phone calls and text messages

[RSE67]

Hello,
I installed Murena 3.5-a1520260211580868-official-FP6 on my Fairphone 6. But the problem was also present in Murena 3.4.
I am largely satisfied.
However, the phone function is prone to connection problems.
After a while, the phone and text messaging disconnect without me doing anything.
When someone calls me, it goes to voicemail and I can’t make any calls.
I have to restart the FairPhone 6 for the phone and text messaging to work again.
This is a nuisance for a phone that is supposed to be used for making calls.
Have you encountered this problem?
I am with the operator Sunrise in Switzerland.
Thank you for your help.

[gefri]

Perhaps have a look at our discussion here:

Incoming phone calls not received

FP5 with 3.4-a15-20260114569178-official-FP5 Since the OTA upgrade A13->A15 I have recurrently the situation, that incoming calls are not received by the phone. The caller is immediately dropped as if my phone were offline, which is not the case. Instead I instantly receive an SMS from the provider about a ‘missed call’. Rebooting the phone resolves this issue for a while, i.e. receiving calls as usual. Any ideas about possible cause and solutions are appreciated. Thank you

[RSE67]

Unfortunately, the proposed solutions in that thread aren’t working for me, When this issue occurs, I usually have to go in airplane mode for at least 30 seconds then it’s working again (80% of the time), but for a few hours and then calls or/and text messages are not working anymore. the strange thing is that I can sometimes send SMS to someone and they will receive them, but if that persons send me a SMS I won’t.

Maybe this is a firmware issue ? But this should be a priority for /e/ OS team, as a phone should be able to make phone calls and text messages (before being able to use anything else)

[Eoin]

I am running 3.6 and having this problem - when overseas system won’t automatically connect to data network and on return home a few days later would not log back into home network. I have got the cLl s working but no unable to send and receive text messages this is a big deal for me and I will have to change operating system if it continues

[aibd]

You don’t mention roaming specifically sounds a bit like Fixing "No Roaming abroad" bug (Fairphone6 with /e/OS3.6 and e.g. Congstar).