Ubuntu Touch with OTA updates

[Djhg2000]

After a few weeks of usage with UBports, modem stopped working.
My suspicion is that it might have been broken by crust, since it doesn't work with other images either, and it was having issues for more than a week now (not starting after deep sleep). The other possibility is that it was faulty from the start, and it just died now.
I tried a factory test, and the modem test fails with a boot timeut.
Anyone else having these issues?

Unfortunately that sounds like modem firmware corruption to me. Did you have any unusual shutdowns before it stopped working?

This is a known weak point of the EG25-G. It needs some time to shutdown before power is removed because the internal flash can end up in an invalid state. Why and how Qualcomm did this is beyond me, but it can't recover from a bad flash by itself.

IIRC there is a procedure for recovering a corrupted modem somewhere in the modem documentation but I don't know if the PinePhone is capable of doing it on its own (might require extra pins?). I might have a look at this and see what the exact details are.