From the recovery menu, you can now wipe the system and flash your custom ROM .zip file (like LineageOS) directly from an SD card or via adb sideload .
If all boxes are checked, dive into XDA Developers forums for your specific Docomo model, join the Telegram group dedicated to Japanese phone modding, and proceed with caution. Unlocking is a journey—not just a single command. docomo unlock bootloader install
Prerequisites
The device will wipe all data and reboot. From the recovery menu, you can now wipe
If you find an eligible device or a rare exploit, the general procedure involves the following stages: 1. Confirming Unlock Eligibility From the recovery menu