Newflasher is the modern replacement for FlashTool, ideal for Windows 10/11.
If you need to find the links for the software utilities or want to verify compatibility with a specific firmware build number, please let me know.
For the average user, this made the phone a seamless "ecosystem" participant in Docomo’s network. For the power user, however, the official ROM often felt sluggish compared to the "pure" Sony experience found on unlocked global models. The SO-01J ROM had to manage the bloatware while running Android 6.0 (Marshmallow) and later Android 7.0 (Nougat), pushing the 3GB of RAM to its limits.
While the internals (Snapdragon 820, 3GB RAM, 5.2-inch 1080p display) are identical to the global variant, the modem, bootloader, and partition layout are distinctly different. The firmware includes specific carrier aggregations (for LTE bands 1, 19, 21, and 28), Osifu-Keitai security protocols, and Japanese-exclusive features like POBox Plus (a Japanese input keyboard) and 1-Seg mobile TV support. Official Sony Xperia XZ SO-01J -Docomo Japan- Stock Rom
The LED indicator light on the phone will turn , indicating it has successfully entered Flashmode.
Click on the (Flash device) in the top-left corner. Select Flashmode from the pop-up prompt and click OK.
If you own a from NTT Docomo Japan , restoring the device with the official stock ROM is essential for unbricking, fixing software issues, reverting custom firmware, or preparing the phone for resale. This write-up covers everything you need to know about the genuine Docomo stock firmware. Newflasher is the modern replacement for FlashTool, ideal
: Over time, Android devices accumulate cached junk. A clean install of the official firmware removes lag and fixes system stability issues. Firmware Information
Providing these details helps tailor the exact steps for your recovery process. Share public link
Once you have downloaded the firmware (usually as an .ftf bundle or a folder of .sin files), follow these steps. For the power user, however, the official ROM
Sony Xperia XZ SO-01J is the specific Japanese carrier variant of the Xperia XZ flagship, released exclusively through NTT DoCoMo
The Sony Xperia XZ (SO-01J) remains a notable device for users who appreciate Sony's classic design and reliable build quality. Released specifically for the NTT Docomo network in Japan, this variant comes with unique regional configurations, bloatware, and network locks.
: Use an official or certified USB Type-C cable. A loose connection during flashing can corrupt the mainboard.
adb shell pm disable-user --user 0 com.nttdocomo.android.dhome