A correct file name will look like: Sony_Xperia_L1_G3312_47.1.A.12.235_R9A_Customized_UK.ftf
If you had a Google account on the phone, you might be asked for those credentials after the reset (Factory Reset Protection). If you've forgotten them, you may need a separate FRP Bypass method . Sony G3312 Lock Remove Ftf File
Before attempting to remove the lock using an FTF file, ensure you have: A correct file name will look like: Sony_Xperia_L1_G3312_47