I'm trying to install LineageOS 15.1 on my old HTC One M7 UK version, factory unlocked.
I can access recovery and phone is being detected by computer with no issue so i can sideload files.
I've flashed nearly every single phone I owned therefore I'm quite familiar with the process however this time I can't get it to work.
I downloaded LineageOS and recommended MindtheGapps from trusted links (due to my first post I can't post any links here) and MD5 checked them.
I followed official lineageOS flashing instruction:
-I unlocked bootloader
-TWRP version 18.104.22.168-m7 installed (tried few other version however they wouldn't recognised the phone model)
-fomat everything and wiped as well
-Flashed few different LineageOS ROM files but only one is actually getting past HTC logo and shows LineageOS animation
-flashed recommended MindtheGapps for android 8.1 (arm)
Problem is that it gets stuck on boot animation for about 5 mins like it was loading the system but it always end up with phone restarting itself and then same thing again. I checked few different OS (ressurection, AICP) but the phone behaves exactly the same like there was something missing and phone couldn't completely load.
I spent last 2 days researching and I'm under the impression that I haven't got any firmware installed but I don't want to risk installing wrong one and completely bricking the phone.
If someone could point me in the right direction it'd be very much appreciated.
Please see below result from "fastboot getvar all" command
version-misc: PVT SHIP S-ON