To remove the lock, you need the official stock firmware for the G3311 model.
An FTF file is a firmware file used to flash or update the operating system on Sony devices. It contains the necessary data to rewrite the device's firmware, which can be used to remove locks, update software, or even fix issues. sony g3311 lock remove ftf
: In the "Wipe" section, ensure USERDATA and CACHE are checked. This is what wipes the lock. To remove the lock, you need the official
Try a different USB port (avoid USB 3.0/Blue ports; use USB 2.0). To remove the lock
If the above method doesn't work, you can try using SP Flash Tool: