Press the home button (Blue) and On/Off Button (Green) at the same time Keep holding them until you see the Apple logo
Category: Soft Reset
How to soft reset your device
Apple iPhone 4 Soft Reset
Press the home button (Blue) and On/Off Button (Green) at the same time Keep holding them until you see the Apple logo
Apple iPhone 3GS Soft Reset
Press the home button (Blue) and On/Off Button (Green) at the same time Keep holding them until you see the Apple logo
Apple iPhone 3G Soft Reset
Press the home button (Blue) and On/Off Button (Green) at the same time Keep holding them until you see the Apple logo
Apple iPhone 2G Soft Reset
Press the home button (Blue) and On/Off Button (Green) at the same time Keep holding them until you see the Apple logo