: Power off your phone. Hold the Volume Down button and connect it to your PC via USB. A green LED usually indicates Flash Mode.
: In Flashtool, select the downloaded FTF. Ensure "Wipe" options (USERDATA and CACHE) are checked to effectively remove the lock. Download SOV33 311 R16C Remove Lock ftf
: Install Flashtool and ensure you have at least 50% battery. Download Firmware : Use Xperifirm within Flashtool to find model and download the 31.1.C.1.160 (R16C) build. : Power off your phone
Flashing an FTF file essentially performs a factory reset, which erases all user data but removes screen locks (PIN, pattern, or password). : In Flashtool, select the downloaded FTF
: For standard software issues or forgetting your PIN/pattern, Sony recommends using Xperia Companion for a secure "Software Repair".
, you typically use third-party tools like and Flashtool . Essential Tools & Resources