我要換手機

Begin by holding the sleep/wake button at the top right of the device and the Home button at the bottom center of the face at the same time.Hold them both until you see the screen go black. In some cases, you may need to keep holding them even after the red power-off slider appears. If it appears, just keep holding it.Wait until the silver Apple logo appears.When this happens, you can let go - the iPhone is rebooting.

較乾淨方法～把iphone4連接USB到電腦，保持上網狀態，按恢復原廠功能／回復原廠功能等待完成方可。