Xperia Companion will automatically download and install the official, latest NTT Docomo stock ROM for your SO-01J. 5. Troubleshooting (Post-Flash)
Move the downloaded .ftf file into your local Flashtool firmware directory (usually located at C:\Users\YourUsername\.flashTool\firmwares ). Step 2: Configure Flashtool Official Sony Xperia XZ SO-01J -Docomo Japan- Stock Rom
is a carrier-specific variant of the global Sony Xperia XZ, engineered exclusively for the NTT Docomo network in Japan. Downloading the correct firmware matching your specific model number is critical to avoid permanent bricking. Specification Carrier NTT Docomo (Japan) Processor Qualcomm Snapdragon 820 Android Versions Available Android 6.0 (Marshmallow) up to Android 8.0 (Oreo) Firmware Type Official FTF (Flash Tool Firmware) Why You Need the Official Stock ROM Xperia Companion will automatically download and install the
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 Step 2: Configure Flashtool is a carrier-specific variant
The SO-01J is the specific NTT Docomo version. Do flash stock ROMs meant for international versions (F8331/F8332) unless you know how to handle customized partitions, as this may break functionality like NFC or Docomo bloatware.
: If your phone is stuck on the Sony or Docomo logo, flashing the stock ROM completely overwrites corrupted system files.
Recommended resources to find the official (.ftf) files include the XDA Developers Forum for Xperia XZ or specialized sites like XperiFirm. How to Flash the Official Sony Xperia XZ SO-01J ROM