Unlocking the bootloader on NTT Docomo branded devices (typically Sony Xperia, Samsung, or Sharp) is notoriously difficult because Docomo usually sets the bootloader status to for unlocking by default. 1. Check Your Unlock Status
Open a terminal on your PC and type:fastboot oem unlock [YOUR_KEY] or fastboot flashing unlock. Follow the on-screen prompts to confirm. 💾 Step 3: Installing Custom Recovery & ROMs
Sony Xperia 1/5 series (Docomo version):
Visit Sony’s official unlock website, enter your IMEI, and receive an unlock code. Then run:
Risk: These services are often unofficial and can be expensive. Option B: Official Fastboot (Rarely works for docomo) If by some miracle your device allows it: