For devices that aren't connected to Wi-Fi or for users who have forgotten their Google credentials, Sony’s official PC software provides a feature. This will factory reset the phone and erase all internal data.
A Windows or Mac computer, a USB cable, and the Xperia Companion application. Step-by-Step: Install and open Xperia Companion on your PC. Select "Software Repair" on the main screen. Bypass Lock Screen Pattern on SONY Xperia S LT26i
Wait 30 seconds until a button appears at the bottom of the screen. Tap it and select "Enter Google Account Details" . Type in your primary Gmail username and password. For devices that aren't connected to Wi-Fi or