1. Backup your device.
  2. Follow the prerequisite steps here
  3. Reboot to the bootloader: With the device powered off, hold Volume Down + Power.
  4. $ fastboot oem unlock or $ fastboot flashing unlock
  5. Reboot the device, then reboot back to bootloader
  6. $ fastboot erase avb_custom_key
  7. $ fastboot flash avb_custom_key avb_pkmd-fp3.bin
  8. Reboot to the bootloader
  9. $ fastboot update divested-20.0-20230907-dos-FP3-fastboot.zip
  10. Reboot to the recovery: With the device powered off, hold Volume Up + Power.
  11. Choose "Apply update", then "Apply from ADB", and $ adb sideload divested-20.0-20230907-dos-FP3.zip
  12. While still in the recovery perform a factory reset
  13. Reboot into DivestOS. If it takes more than 10 minutes to boot then something is wrong. Do not let it sit for more than 10 minutes!
  14. There are monthly updates. You MUST read the News page and backup your device before each update.