Launch the Flashtool application on your PC. Click on the icon in the top left corner, select Flashmode , and click OK . Step 3: Select the SO-01J Firmware
If you can tell me (e.g., bootloop, slow performance) or if you need help finding the latest Android version for your SO-01J , I can provide more specific instructions or links. Share public link
Even years later, the Stock ROM maintains a level of polish that many users find runs "smoother and cooler" than the final global updates. Specification Qualcomm Snapdragon 820 5.2-inch TRILUMINOS Full HD (1080 x 1920) 23MP Rear with Triple Image Sensing (Laser AF, RGBC-IR) RAM/Storage 3GB RAM / 32GB ROM (expandable via microSD) Durability IP65/68 Water and Dust resistance A Collector's Note Sony Xperia XZ SO-01J technical specifications
Download and install the latest version of on your PC. Official Sony Xperia XZ SO-01J -Docomo Japan- Stock Rom
The flashing process will begin. Once it says "Flashing Finished," restart your phone. Post-Flashing: First Boot and Setup
SO-01J_39.2.B.0.336_1305-9077_R15C (Android 8.0 Oreo).
It's crucial to understand that unlike the global F8331 model, the bootloader on the Japanese Docomo SO-01J variant is notoriously locked and is generally considered un-unlockable . While some users have reported a toggle in developer options under "OEM unlocking," its actual functionality for the SO-01J is highly debated. Therefore, for most purposes, you should treat the bootloader as locked and only flash official software intended for this specific model. Attempting to flash generic firmware (like the F8331 version) will almost certainly result in a soft brick. Launch the Flashtool application on your PC
adb shell getprop ro.build.fingerprint # Expected: Sony/SO-01J_.../SO-01J:8.0.0/...
: If the phone boots for more than 15 minutes, force power it off (Hold Power + Volume Up), reopen your flashing tool, and ensure you selected the option to wipe user data ( userdata.sin ). A dirty flash over old system configurations often causes loops.
Flashing a stock ROM will erase all user data (apps, photos, contacts). Perform a full backup first. Share public link Even years later, the Stock
The LED notification light on the phone should turn , indicating it has successfully entered Flashmode. Step 5: Execute the Flash
Perform a factory reset via Recovery Mode.