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I have just pulled the backups now. Here's what I did. 1)  Unlocked bootloader following this guide --> (ATTENTION, at the end of step 3, after enabling USB Debugging, find another option on the same screen called "OEM unlocking". Enable that option too, else you cannot unlock the bootloader. Then, proceed with the remaining steps on the guide) 2) Installed Magisk and rooted phone following this guide -->  3) Downloaded LineageOS 22.2 recovery.img only at this point. Booted to the bootloader, by issuing the command below: adb reboot bootloader Then flashed the LineageOS Recovery with the command below: fastboot flash recovery recovery.img After flashing was finished, I selected "boot to recovery" on the bootloader. 4) Once on the Lineage Recovery, I selected "enable ADB" and followed Eske's guide found here --> https://eskerahn.dk/?p=4633 One adjustment to Eske's instructions is that I replaced his ls command with: adb ls -lah /dev/block/by-name And, from that list, I could find the device names for the partitions that are recommended that we back up. This is what they were linked to in my particular phone: lrwxrwxrwx 1 root root 15 1970-01-01 00:47 fsc -> /dev/block/sdf5 lrwxrwxrwx 1 root root 15 1970-01-01 00:47 fsg -> /dev/block/sdf4 lrwxrwxrwx 1 root root 15 1970-01-01 00:47 modemst1 -> /dev/block/sdf2 lrwxrwxrwx 1 root root 15 1970-01-01 00:47 modemst2 -> /dev/block/sdf3 lrwxrwxrwx 1 root root 15 1970-01-01 00:47 persist -> /dev/block/sda2 So, I just ran the "adb push <source> <destination_backup.img>" command for each of the above. These are the sizes for each of the images: -rw-r--r-- 1 localuser domain users 131072 jun 30 17:11 fsc_backup.img -rw-r--r-- 1 localuser domain users 2097152 jun 30 17:11 fsg_backup.img -rw-r--r-- 1 localuser domain users 2097152 jun 30 17:10 modemst1_backup.img -rw-r--r-- 1 localuser domain users 2097152 jun 30 17:10 modemst2_backup.img -rw-r--r-- 1 localuser domain users 33554432 jun 30 17:09 persist_backup.img Hopefully my backups are correct? 32M for persist, 2M for modemst1, modemst2 and fsg; and 128K for fsc.   EDIT: As I now think further about it, step 2) above (rooting with Magisk) is probably not necessary. I had done it believing I could use adb on a rooted system with the phone booted to Android. It didn't work as the adb pull command would always run internally on the phone as an unprivileged user and didn't have access to the /dev/block devices. I believe it's likely that performing steps 1), 3) and 4) above is sufficient.

I was on full stock. Still couldn't make it work. After bashing my head a lot, I found the answer. Here's what I had missed:    

Lineage-22.2-20250630-NIGHTLY-pro1x with June 1st security patch installed smoothly via OTA. MindTheGapps15, and root was maintained.

I received the phone (Pro1x) in one of the first batches and I did order it from the website. It might have been due to some (lucky for me 😉 ) confusion at FxTec, because I alse made an IndieGoGo order of the spare battery (and never received it), thus I was _also_ an IndieGoGo contributor (who paid more for the phone due to higher price on the website - as a compensation for a supposedly lower risk of paying but not receiving anything - cough, cough - and yet even more due to additional money paid for a never delivered spare battery).

try restoring back to stock android and repeat the process?