: It is considered a "tested" and reliable way to recover a device when the password is forgotten. : There is a risk of firmware corruption
: Download and install the classic Sony Mobile Flasher (Flashtool). Flashtool Drivers : Go to the folder where you installed Flashtool (usually C:\Flashtool\drivers Flashtool-drivers.exe , and check the boxes for Fastboot Drivers Flashmode Drivers , and specific Xperia Z Ultra FTF Firmware File : You need a stock FTF firmware file tailored for the sony c6802 lock remove ftf
Connect the phone in flash mode
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