: Modern security, specifically FRP (Factory Reset Protection), is not always removed by simply flashing a new FTF. The device remains linked to the original Google account in the cloud, often requiring an additional FRP bypass even after a fresh system install. Why Sony Xperia Companion is Often "Better" For the average user, Sony's official Xperia Companion is the superior choice over manual FTF flashing.
: You don't need a Google account or internet access on the device during the initial flash. Review of the Lock Removal Process sony sov33 lock remove ftf better
: This is a firmware package format specific to Sony Xperia devices. Flashing a stock FTF file overwrites the current system data, effectively removing the security lock. : Modern security