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For OnePlus 8/8 Pro & 8T/9R

Prerequisites:‚Äč

  • Working brains, common sense, lots of coffee

    danger

    OOS12 C.33-C.36 in BOTH SLOTS! DO NOT SKIP THIS!

  • Latest platform-tools

  • Google USB driver

  • Developer options enabled: Settings -> About phone -> Tap Build number at the bottom seven (7) times

  • ADB enabled: Settings -> System -> Developer options -> USB debugging

  • Required images: boot.img, vbmeta.img, vbmeta_system.img and recovery.img (put these in the same folder with platform-tools)

  • Get images from sourceforge

  • ROM zip (put it in the same folder with platform-tools)

  • Unlocked bootloader

    note

    If you are currently on OOS11 it's better to unlock bootloader before updating to OOS12. For unknown reason some devices cannot be unlocked in OOS12.

  1. Reboot your phone to fastboot mode

  2. Open cmd and go to the folder where platform tools are (DO NOT USE POWERSHELL!)

  3. Enter following commands by copypasting one by one:

    fastboot flash boot boot.img
    fastboot flash --disable-verity --disable-verification vbmeta vbmeta.img
    fastboot flash --disable-verity --disable-verification vbmeta_system vbmeta_system.img
    fastboot flash recovery recovery.img
  4. Reboot your phone to recovery mode, click "Install update" -> "ADB Sideload"

  5. In cmd enter command:

    adb sideload Nameless-AOSP_xxx.zip
  6. Wait until your device shows Step 2/2 and back arrow appears. Click back arrow, then click "Factory reset" -> "Format data/factory reset" -> "Format data"

    info

    Progress on your pc will stop at around 47%. It is normal behaviour. Click back arrow in recovery, then click "Reboot to system"