Answer to: Why iPhone 4 doesn't vibrate?Guys, Please help me I first downloaded ibrate, but as usual my vibrator didnt work but when i tapped it back it started working! Again when i stopped the vibrator and started again, it didnt start to vibrate, again if i tap it vibrates. i mean my phone's vibrator need to get tapped to start rotating! when it starts to vibrate it will work with no error, but only when i pause and restart the vibrator it does not start until i tap it! please guide me for further techniques!