Official Sony Xperia Xz So-01j -docomo Japan- Stock Rom [exclusive] Jun 2026
Before selling your used SO-01J, you should flash the stock ROM to wipe all personal data completely and restore carrier demo modes (if applicable).
After successfully flashing the , do the following:
Sony and Docomo released several builds for the SO-01J. The most common official versions include:
: Over time, Android devices accumulate cached junk. A clean install of the official firmware removes lag and fixes system stability issues. Firmware Information Official Sony Xperia XZ SO-01J -Docomo Japan- Stock Rom
SO-01J Firmware (39.2.B.0.328_R14C, 39.2.B.0.256_R12C).
A: While you could, it's generally not advised. It will void any warranty, irreversibly delete your DRM keys (affecting camera performance), and still won't allow you to flash generic ROMs without other issues.
| Feature | SO-01J (Docomo) | Global F8331 | | :--- | :--- | :--- | | | SO-01J | F8331 / F8332 | | Bootloader Unlock | Officially NOT allowed (Docomo policy) | Allowed (via Sony site) | | Firmware Features | Osaifu-Keitai (Felica), Docomo bloatware | Sony AOSP/stock features | | Latest Android | Android 8.0 (Oreo) | Android 8.0 (Oreo) | | Baseband/Modem | Japan-specific LTE bands | International bands | Before selling your used SO-01J, you should flash
| Tool | Purpose | | :--- | :--- | | | Flashing FTF on locked bootloaders. Do not use old Flashtool (broken for SO-01J). | | XperiFirm | Download official firmware | | Sony USB Drivers | Included in Emma or standalone | | Fastboot/ADB | Only for basic commands (not bootloader unlock) |
If you need to restore your device to its original state or update to the latest stock ROM, you can download the official firmware from Sony's website or other reputable sources. Here's a step-by-step guide:
Flashing the official stock firmware restores your phone's software to its factory-fresh state. Here is why you might need it: A clean install of the official firmware removes
Ensure your Xperia XZ has at least 50% battery capacity. A sudden power loss mid-flash will corrupt the partition table of your device. 3. Install Device Drivers
Many websites offering "Stock ROMs" are filled with malware, adware, or fake files. Do not download from random forums offering direct EXE installers.
Release the volume button. Flashtool will automatically detect the device and begin the flashing process.