Yes, removing a lock screen via FTF file requires a factory reset, which erases all user data.
In the Source Folder field, ensure it targets your firmwares directory. Select from the device list on the left panel.
Navigate to the installation directory (usually C:\Flashtool\drivers ) and run Flashtool-drivers.exe . Select and Fastboot/Flashmode drivers . 2. Preparing the FTF File Download the appropriate .ftf file for your Xperia Z Ultra C6802
Connect the phone in flash mode
Ensure your Xperia Z Ultra has at least 50% battery life to prevent the device from powering off mid-flash, which can cause a permanent brick.
Release the volume button immediately once the pop-up window disappears and the flashing log starts scrolling. Step 5: Finalizing the Lock Removal
: 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
If you have already downloaded the C6802 FTF file, move it to the C:/Users/[YourUser]/.flashTool/firmwares folder (or the firmwares folder within the Flashtool installation directory). Open Flashtool and click the Lightning Bolt icon . Select Flashmode and click OK. Find the C6802 firmware in the left pane.
Click and proceed through the Windows security prompts to authorize the unsigned drivers.
The tool should show "Device connected in flash mode" and begin the process. Do not disconnect until you see a "Flashing finished" message. Yes, removing a lock screen via FTF file
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.
Look at the right panel under the section. Ensure that USERDATA , CACHE , and APPSLOG are checked. This step guarantees that the old screen lock data is completely wiped from the device.