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HOW-TO-UPDATE.md

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How to update LineageOS 19.1 for the Unihertz Atom L and XL

Every piece of software should allways kept up-to-date. Therefore even this ROM get updates from time to time and you should allways apply these to your device.

(optional) Updating TWRP recovery

  1. Download recovery.img from the latest release page of your device.
  2. Connect your phone to your PC and open a terminal or a command line window.
  3. Run adb reboot recovery on your PC or simply hold volume up while turning power on to boot your device into the recovery.
  4. Wait for TWRP to boot.
  5. Run adb push recovery.img /external_sd.
  6. In TWRP select Install.
  7. Use Select Storage to switch to your SD card.
  8. Use Install Image to switch to image installation mode.
  9. Select recovery.img from the list.
  10. Select Recovery partition.
  11. Swipe the slider on the bottom to the right to confirm.

Updating LineageOS ROM

  1. Download lineage-19.1-XXX-UNOFFICIAL-YYY-signed.zip from the latest release page of your device.
  2. Connect your phone to your PC and open a terminal or a command line window.
  3. Run adb reboot recovery on your PC or simply hold volume up while turning power on to boot your device into the recovery.
  4. (Optional) In TWRP select Wipe > Advanced Wipe.
  5. (Optional) Tick Dalvik / ART Cache, Cache, Data, Internal Storage.
  6. (Optional) Swipe the slider on the bottom to the right to confirm. (THIS WILL WIPE ALL DATA!)
  7. Go back to the home screen and select Advanced > ADB Sideload.
  8. Swipe the slider on the bottom to the right to confirm.
  9. Run adb sideload lineage-19.1-XXX-UNOFFICIAL-YYY.zip from your PC.
  10. Wait for the process to finish. The recovery might prompt something about verification failure, just ignore it and continue anyway.
  11. (Optional) You need to flash all the additional modules that you previously installed.
  12. Select Reboot System to reboot into LineageOS and enjoy. Note that Magisk might cause your device to boot loop once or two but it will eventually boot.

Steps 4 to 6 are optional but if you encounter any errors later on you are on your own.