To remove a screen lock from a Sony Xperia L1 (G3312), you can either use the official Sony Xperia Companion tool or flash a stock firmware (FTF file) using Xperia Flashtool. Flashing will delete all user data from the device. Method 1: Official Software Repair (Recommended)
Q: Can I keep my photos? A: No. Lock removal via FTF wipes everything. Always backup before you get locked out.
Wait for the process to complete, then disconnect and power on your phone.
Xperia Companion: Use the "Software Repair" feature on the Sony Support site to erase the security layer.
Important Notes
Install Necessary Drivers and Software: You'll need to install the Sony Flash Tool (also known as Xperia Flash Tool) on your computer, along with appropriate USB drivers for your device.