: Use the "Software Repair" feature to reset the device (this will erase all data). Google Find My Device
| 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
FTF firmware file into the Flashtool firmwares directory (usually located at C:\Users\YourUsername\.flashTool\firmwares 2. Put Flashtool in Flashmode Click on the Lightning Bolt icon at the top left of the Flashtool interface. A source folder window will appear. Select the Sony Xperia Z Ultra (C6802) from the list on the left. On the right side under the pane, make sure to check : Use the "Software Repair" feature to reset