On some firmware versions, use Power + Volume Up until the phone vibrates. Continue holding until the recovery screen appears to select "Clear Storage" . Master Reset SONY Xperia S LT26i - HardReset.info
Once authenticated, you will be prompted to create a new unlock pattern or disable it entirely. 2. Sony Xperia Companion (The "Official" Fix) 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. On some firmware versions, use Power + Volume
If you don't have access to a computer, you can attempt a hard reset using the physical buttons on the device. This deletes all user data from the phone's internal memory. Type in your primary Gmail username and password
Follow the on-screen instructions to finish the repair and wipe the device. 3. Hardware Key Factory Reset