✅ Conclusion: To remove lock via FTF, you must wipe (or flash a TA backup that wipes it).
The user wants to on a Sony D6603 (Xperia Z3) by flashing an .ftf file — typically via Flashtool (PC) or Emma (Sony’s official tool). An FTF is a Sony-specific full firmware package containing system, kernel, and other partitions.
If you own a Sony Xperia Z3 (model D6603) and find yourself locked out due to a forgotten pattern, PIN, or password, the situation can feel dire. For many Android devices, a simple factory reset via recovery mode is the solution. However, Sony Xperia devices are unique. Due to their security architecture, performing a standard factory reset often leaves the device locked by Factory Reset Protection (FRP) or the original security layer, rendering the phone unusable even after a wipe.