1. Backup your device.
2. Follow the prerequisite steps here
3. Follow the vendor-specific unlock steps here
4. Reboot to the bootloader: With the device powered off, hold Volume Up and connect the USB cable. The notification light should turn blue.
5. $ fastboot update divested-19.1-20230918-dos-mermaid-fastboot.zip
6. Reboot to the recovery: With the device powered off, hold Volume Down + Power.
7. Choose "Apply update", then "Apply from ADB", and $ adb sideload copy-partitions-mermaid-release.zip
8. Choose "Apply update", then "Apply from ADB", and $ adb sideload divested-19.1-20230918-dos-mermaid.zip
9. While still in the recovery perform a factory reset
10. 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!
11. There are monthly updates. You MUST read the News page and backup your device before each update.