1 Switch off ‘ Find my iPhone ’ of your device. 2  Connect your iPhone to a computer and launch iTunes. 3  Now select your device from the menu on the top left and click on ‘Restore iPhone’. 4  Now click ‘Restore and Update’.esetting Your iPhone. Another thing you can do is reset your iDevice. Resetting will remove the old settings which means you will have to set up your Touch ID, change the wallpaper, and enter the password, again.