To remove the screen lock on a using an FTF (Flash Tool File) , you must flash the device's firmware using the Xperia Flashtool. This process effectively factory resets the device and wipes all user data. Prerequisites
Flash the FTF (full wipe)
The tool should show "Device connected in flash mode" and begin the process. Do not disconnect until you see a "Flashing finished" message. sony c6802 lock remove ftf
Sony Xperia Z Ultra (C6802 – 3G variant) Subject: Using FTF (FlashTool Firmware) files to remove a network/SIM lock. Verdict: FTF firmware alone cannot remove a permanent network SIM lock. FTF flashing can only: Sony Xperia Z Ultra (C6802) To remove the
If you want exact links, step-by-step screenshots, or an alternative method (ADB, recovery, or service-mode), say which and I’ll provide it. Do not disconnect until you see a "Flashing