If you're not comfortable using the Sony G3312 lock remove FTF file, consider alternative solutions:
If the phone asks for a Google account after the reset and you don't remember the credentials, you will need to perform an FRP Bypass . This often involves using TalkBack settings or specific FRP bypass APKs without needing a PC. : You can also use the official Xperia Companion Software Repair Sony G3312 Lock Remove Ftf File
In the Wipe pane on the right, ensure USERDATA and CACHE are checked to ensure the lock screen is actually removed. 3. Connect the Phone in Flash Mode Firmware Change/Update on SONY Xperia L1 Dual G3312 If you're not comfortable using the Sony G3312