Pinephone woon't stay registered

[jhasler]

I cannot help you with this, but have you tried Biktors firmware?

link: https://github.com/Biktorgj/pinephone_modem_sdk

note: use at your own risk.

I'm using Biktor's firmware for several month now, works perfect.

I'm using PMOS (edge) for several month now without modem disconnects, works perfect. The modem wakes up
reliably from suspend and rings at the first dial tone.

I'm using ADSP Version 01.003.01.003

I may try that after I have this thing working as well as it does for most other Pinephone users.  I've ordered a sim from US Mobile to see if the Tracfone sim is the problem.  I think that  "couldn't load operator code: Current operator MCC/MNC is still unknown" is at the core.

I've been learning more than I really wanted to know about the insanely complex cellphone APIs, protocols, and interfaces.