To remove the screen lock (pattern, PIN, or password) on a Sony Xperia L1 (G3312) using an FTF file, you must flash the device with original firmware using a tool like Sony Flashtool . This process will erase all personal data on the device. Method 1: Flashing with Sony Flashtool (FTF File)
Q: Will this work on a G3311 or G3313? A: No. Using a G3312 FTF on a different model will brick it. Find the exact FTF for your model. Sony G3312 Lock Remove Ftf File
Xperia Flash Tool (Flashtool): The primary software used to load and install the .ftf file onto the device. To remove the screen lock (pattern, PIN, or
Conclusion
Download and install Sony Mobile Flasher (formerly Emma) on your computer. Xperia Flash Tool (Flashtool) : The primary software
Once selected, ensure all options under Wipe (Userdata, Cache) are checked to ensure the lock is removed. 2. Enter Flash Mode Power off the phone completely. Hold the Volume Down button.