Thanks for sharing your FP2 story. I was suffering from a malfunctioning core unit that could not be repaired anymore, but I got another used FP2 in quite good condition. All in all, my FP2 experience really is not the “best” due to the relatively high costs compared to a rather short usage period, which is half a year in my case…
Just a few notes to your comments:
Lineage OS does exist for the FP2, too. And I am looking forward to the mobile data bugfix that I think will be rolled out shortly…
What you describe sounds like an issue with a loose antennae cable: