HELP NEEDED - ERROR: No OS installed!
Problem after updating the wrong way (i think) (first of all, I am not a techie, just hate to have to buy a new phone and pollute the earth and spend money while it is not necessary. And I like to figure stuff out.
I used Lineage OS 17.1 on my OP3T for almost a year. But I never got any updates. It turned out the reason was that I had a version with test keys without realizing it.
Someone pointed me to this file: lineage-migration-signed.zip and the official releases. After I installed the migration zip I could install the official Lineage OS 17.1 and i was really happy.
For about a week. Then I noticed a Lineage OS (the last one of 22 feb) update and downloaded it on my 3t and installed it. Probably the wrong way. It got stuck in a boot loop.
Since that moment I tried all sorts of things, but I only messed things up further I think and lost all my data...
I managed to get twrp back, using adb sideload I installed lineage 17.1 + Gapps. But now when I want to reboot, the OP says: No OS installed!
I reinstalled, but didn't help.
What to do??
update: copied lineage.zip to op3 using tmp with pc connection and flashed it.
Now I am back in a boot loop and I have Recovery OS again.... *sigh*
it seems I have wiped my system partition?
update2: flashed twrp again using fastboot flash recovery
Update3: this is what I did:
Formated Data in TWRP + Advanced wipe of Cache, Dalvik / Art Cache & System then with adb sideload, flashed LineageOS + Gapps one after the other, in that order & in one go without rebooting in between which seemed to go fine, no errors.
Result: TWRP says: No OS installed!