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
To remove the screen lock (pin, pattern, or password) on your Sony Xperia Z Ultra (C6802) sony c6802 lock remove ftf
Look at the section on the right panel. Check the boxes for USERDATA , CACHE , and APPSLOG . Note: Leaving these unchecked will preserve the locked state; ticking them forces the factory reset that removes the lock. FTF firmware file into the Flashtool firmwares directory
Download and install the official Sony Xperia Z Ultra drivers to ensure your PC recognizes the phone in Flashmode. Select the Sony Xperia Z Ultra (C6802) from
Proper driver installation is the most critical phase. Without the correct drivers, your PC will not recognize the Xperia Z Ultra in Flashmode.
Once flashing finishes, disconnect and reboot the phone, which should now be unlocked.
Because the userdata partition was entirely wiped and rewritten, the initial boot will take significantly longer than a standard restart.