The is a rebranded version of the global Xperia Z4 (or Z3+), released exclusively for the Japanese carrier au by KDDI . While it boasts flagship specs (Snapdragon 810, 3GB RAM, IP68 water resistance), it comes with a notorious downside: a brutal SIM network lock .
Another user ( mobifreak ) claimed: "Modified TA unit 1046b with hex zeroes, repacked FTF, and after 3 tries, SOV33 accepted my foreign SIM. It worked for 2 months until a factory reset brought the lock back." sony sov33 lock remove ftf hot
A "hot" FTF is a custom-flashable firmware package that contains a modified or region-swapped modem configuration. When you flash it, you trick the phone into thinking it is on a docomo network—or you force it to skip the lock check entirely. The term "hot" signifies that the FTF is pre-patched to neutralize the lock flag upon boot. The is a rebranded version of the global
The method is the last resort for desperate users. While technically possible, it demands advanced skills, risky modifications, and an acceptance of permanent damage. It worked for 2 months until a factory
: If the phone was linked to a Google account, you may encounter a Factory Reset Protection (FRP) screen after the flash. This requires the original Google credentials or a separate FRP bypass procedure .
: Must be installed on your PC so the tool can recognize the phone in "Flash Mode".