On some unlocked Docomo phones, re-locking without stock firmware will brick the device. Always flash full stock firmware first.
: You can follow official manufacturer steps (like those on the Sony Developer website ) to unlock it. 2. Why Docomo Devices are Different docomo unlock bootloader install
allowed users to pay for "credits" (around $20–$40) to force the status from "No" to "Yes". On some unlocked Docomo phones, re-locking without stock
– Settings → About phone → Model number. On some unlocked Docomo phones
“Docomo unlock bootloader install” isn’t complete without installation steps. After unlocking: