Removing a screen lock from a Sony Xperia L1 (G3311) typically involves using the Sony Flashtool. This method is often the last resort when a standard hard reset fails or if the device has a locked bootloader that prevents traditional recovery methods. The "Lock Remove" FTF Method
That being said, here's a general review of the process: sony g3311 lock remove ftf
To remove the lock screen:
Ensure your device has at least 50% battery to prevent shutdown during the process. Step-by-Step Guide: Lock Removal via FTF Removing a screen lock from a Sony Xperia
Search for: "Xperia XA1 Plus G3311 Stock Firmware (Flash File)" on trusted XDA threads – ensure it includes the userdata.sin partition for lock removal success. sony g3311 lock remove ftf