No official or leaked FTF for C6802 contains a “remove lock” magic script. Any claim otherwise is a scam.
Download a stock FTF file for the Xperia Z Ultra C6802 from reputable sources like vnROM or XDA Developers. Make sure it matches your model exactly. 2. How to Flash FTF to Remove Lock on C6802 Step 1: Install and Set Up Flashtool Install Flashtool.
Monitor the progress bar inside Flashtool. Do not touch, move, or disconnect the USB cable during this phase.
| Method | Technical Principle | Cost | Difficulty | |--------|--------------------|------|------------| | | Enter code via #7465625*638*# menu (factory service menu) | $10–$25 USD | Easy | | 2. Setool / Octopus Box | Direct TA rewrite using JTAG/diag mode | $100+ hardware + credits | Hard | | 3. Server-side remote unlock | Uses USB diagnostic mode + paid server (e.g., UnlockServer) | $15–$40 | Medium | | 4. Replace SIM card tray PCB | Some C6802 models store lock on a separate EEPROM on SIM flex cable | $20–$50 (used part) | Medium (requires soldering or flex replacement) | sony c6802 lock remove ftf
The C6802 does not have a software-only free unlock via FTF. Any YouTube video claiming “free unlock FTF” is usually fake or malware.
While holding the button, connect the phone to your PC via USB cable.
: If Flashtool doesn't detect your phone when you connect it in Flashmode, it’s almost certainly a driver issue. Re-run the Flashtool-drivers.exe from the Flashtool installation folder and ensure you have selected and installed the drivers for your specific model and for Flashmode. No official or leaked FTF for C6802 contains
Think of the FTF file as a . Flashing such a file overwrites the phone's system partition, effectively installing a fresh copy of the operating system. This process can remove any modifications, including locks, by replacing the old system settings with a clean slate.
This guide utilizes tools optimized for Windows operating systems. Required Downloads and Tools
Reinstall drivers or try a different USB port/cable. Make sure it matches your model exactly
For more technical assistance with Android flashing, you can visit forums like XDA Developers for device-specific support.
Note that the folder name begins with a dot (.flashTool), so you may need to enable "Show hidden files" in Windows Explorer.
Place the downloaded FTF file in the Flashtool > Firmwares folder on your computer. Step 2: Install Drivers (Crucial)