The only reliable, hardware-safe method to completely remove the screen lock and regain full access is by using Sony's native Flash Tool, Flashtool (by Androxyde).
Flashing a new FTF file to remove the screen lock will completely wipe the device. All photos, contacts, apps, and internal data will be permanently deleted.
During installation, check the boxes for and Fastboot Drivers .
Wait until the log window displays the message: "Flashing finished" or "Flash finished successfully" . Unplug the USB cable from your phone.
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Click . The tool will take a moment to prepare the files and will then prompt you to connect your phone. Connect in Flashmode : Turn off your Sony G3311 completely.
The safest way to remove a forgotten pattern or PIN is using the Xperia Companion software on a PC.
Under the section, ensure USERDATA , CACHE , and APPSLOG are checked to guarantee the lock screen data is deleted. 4. Boot the Sony Xperia L1 into Flashmode
If you can’t find the exact G3311 FTF, use ’s “Software Repair” — it will wipe everything but guarantee a lock removal.