You're looking for a solution to remove the lock on a Sony G3311 device, and you've mentioned an FTF (Flash Tool File) link. Here are some general steps and considerations for unlocking or removing locks on Sony devices, specifically focusing on the Sony G3311. Note that device unlocking often involves risks and should be approached with caution.
Remember to back up your data regularly using Google Drive or Sony’s PC Companion to avoid this situation in the future. sony g3311 lock remove ftf link