LineageOS major update procedure

Backup

  • Enable developer mode by going to Settings > About Phone and tapping “Build Number” seven times

  • Enable USB debugging in Developer Options

  • Test by running adb devices in PC terminal

  • Then run adb backup -apk -shared -all -system -f lineage_backup.ab

Download latest version of TWRP

Make sure you get the right one for Google Pixel 2 (taimen), e.g:

twrp-3.7.0_9-0-taimen.img

Download ROM image and associated files

Go to https://wiki.lineageos.org/devices/taimen/, download zip, viz.

lineage-22.1-20250123-nightly-taimen-signed.zip

Boot into fastboot

Press Power + Vol Down

Check connection with:

fastboot devices

Boot into TWRP

fastboot boot  twrp-3.7.0_9-0-taimen.img

Copy OS rom to Phone

adb push lineage-22*.zip /sdcard/

Install OS in TWRP

In TWRP select Install > Select ROM zip

Select flash

Then reboot

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