@Stemy I had the same issue. I rescued by bricked phone by installing android 10 (accroding to https://support.fairphone.com/hc/en-us/articles/18896094650513-Install-Fairphone-OS-manually#01HB8ZZ1BMMQNSNMFT3YXDBXA0) and afterwards I installed ubuntu touch via the UBports Snap again. The error still appeared after the installation but now my phone boots without any issue.

I confirm this issue on my FP3+, 100% times when I boot it under 10%. Additionally, it's exactly 10%, so it seems either firmware or UT software. If it were hardware, I would expect this 10% to drift over years (with the battery getting old), or being slightly different on different devices.

@stemy I can't confirm this. When were you notified of the missed calls?

@stemy Please tell me, do you have FP3 or the FP3+, what Android version was it running before you installed Ubuntu Touch (UT), how did you install UT, did you wipe userdata when installing UT? How much battery-percent is left usually, when you reboot?

@stemy Maybe bank app needs google services to work, so you should try with the alternate MicroG that spoofs google services.

Hi @Stemy , if you are using the devel channel, please switch to stable, or just use the ubports installer to reflash the device with your prefererred channel.

I travaled abroad, and the 3G was not working either. But all connections, including LTE, started to working fine when i booted my phone after it was discharged. The problem is almost fixed. I say "almost" because sometimes, i don't have network at all when i boot my phone, but this is another story.

@stemy Could it be your device? I copy them via ssh and they appear directly.