benjib1980 I just tried LineageOS, no cell networks available.
Thanks for running that experiment! We now know more than we did before. If you are still inclined to spend "lab time", I can think of a variety of different things to try next.
- Post on some AOSP-variant forums (maybe including the XDA forum) asking if anybody there has Cellcom working.
- Swap LineageOS out for another AOSP variant.
- Try pure AOSP from Google (not Google's stock Pixel OS). This would be more work, but if pure AOSP doens't work with Cellcom (a) that would explain why other AOSP variants don't, and (b) it would be possible to file an issue against AOSP.
At a high level:
- If you can find some AOSP variant where Cellcom works, that could be filed in GrapheneOS issue 2235. Because the GrapheneOS developers would have a hard time debugging the problem without being in Cellcom's area, providing information about an AOSP variant working on Cellcom might not lead to a fix for GrapheneOS. But it might.
- If pure AOSP doesn't work on Cellcom, filing an issue against AOSP is probably the thing to do. It may well be the case that zero AOSP developers are in areas served by Cellcom, so again a fix might not happen. But it might.
I guess in theory you could worm your way far enough into the Cellcom technical infrastructure to find somebody who could help debug the issue. But that seems unlikely unless your cousin's hairdresser's plumber's cousin is a VP at Cellcom or something like that.