I just replaced my original -002 Pinephone touchscreen with a -001 revision that I recently received from the Pine Store. My original screen suffered from the ever worsening delamination defect (or whatever causes the highly visible and, under direct lighting conditions, annoying defect around the edges of the screen). It's a tedious job to replace it but an unanticipated reward was my GPS now works quickly and for more than a few intermittent minutes, best case, for the first time ever! 
After powering up my new screen and, motivated by my desire to record some signal strengths before attempting the aluminum foil hack (hoping for improvement), I ran the alastair proof of concept AGPS script and I was surprised to see record signal strength and a good GPS position almost immediately, instead of the usual zero to low signal and terrestrial-based position errors of several miles, minimum.
In the year I've owned my Pinphone, my GPS has never been able to obtain a fix in the canyon where I live, or nearly anyplace else for that matter, except for very brief periods in flat open country. Satellite signal strengths, as reported my mmcli, were always very low or zero.
I did not notice any problem with the antenna paint on my midframe or the contact fingers on my mainboard, but I suspect that seating the midframe against the contact fingers a few times while fussing with the two parts against each other in trying to mate them correctly, resulted in the metal pins scratching the paint a little bit, improving connectivity.
Either that or a recent Mobian Bookworm software update set it right, but the problem wasn't corrected by my modem firmware update of several months ago, which I'd hoped would solve it. The firmware update made no difference in my signal strength.
After powering up my new screen and, motivated by my desire to record some signal strengths before attempting the aluminum foil hack (hoping for improvement), I ran the alastair proof of concept AGPS script and I was surprised to see record signal strength and a good GPS position almost immediately, instead of the usual zero to low signal and terrestrial-based position errors of several miles, minimum.
In the year I've owned my Pinphone, my GPS has never been able to obtain a fix in the canyon where I live, or nearly anyplace else for that matter, except for very brief periods in flat open country. Satellite signal strengths, as reported my mmcli, were always very low or zero.
I did not notice any problem with the antenna paint on my midframe or the contact fingers on my mainboard, but I suspect that seating the midframe against the contact fingers a few times while fussing with the two parts against each other in trying to mate them correctly, resulted in the metal pins scratching the paint a little bit, improving connectivity.
Either that or a recent Mobian Bookworm software update set it right, but the problem wasn't corrected by my modem firmware update of several months ago, which I'd hoped would solve it. The firmware update made no difference in my signal strength.