Once you have downloaded the firmware (usually as an .ftf bundle or a folder of .sin files), follow these steps.
If your SO-01J still boots but has issues:
Once you have downloaded the firmware (usually as an .ftf bundle or a folder of .sin files), follow these steps.
If your SO-01J still boots but has issues: Official Sony Xperia XZ SO-01J -Docomo Japan- Stock Rom