To disable Anti-Theft, visit My.PSafe and click Sign in with Google account.
Log in with the same Google account registered Anti-theft for your device.
At the home screen, click on the down arrow next to your access code, at the device description on the left.
Click the white button with a negative sign next to the device data and the access code to remove it.
Now, write REMOVE in the field provided and then click Remove Device
All set. The Anti-Theft function was disabled from your device.