Wait until the Flashtool log output displays "Flashing finished" or "Processing of system.sin finished successfully." Step 6: Reboot and Initial Setup Unplug the USB cable from your phone.
: The stock ROM includes extensive Docomo-branded applications (like "Osaifu-Keitai" for mobile payments and "i-concier" concierge services), which are often in Japanese and difficult to remove without advanced tools like ADB. Japanese Carrier Features Official Sony Xperia XZ SO-01J -Docomo Japan- Stock Rom
Disconnect the USB cable and press the Power button to boot your device. Note that the initial boot cycle after a clean firmware flash can take anywhere from 5 to 10 minutes as the system rebuilds its cache. Troubleshooting Common Flashing Errors Wait until the Flashtool log output displays "Flashing
If you have installed a custom ROM (like LineageOS) or rooted your phone and want to return to the original, officially supported Sony software, you must flash the stock ROM. 3. Fixing Software Glitches Note that the initial boot cycle after a
Wait for Flashtool to prepare the files. A prompt will appear instructing you to connect your phone. Turn off your Xperia XZ completely. Press and hold the button.