Device Guides
Apple iPhone 4S
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iOS is the operating system software installed on your iPhone. To find out which version you have: Tap Settings, Tap General, Tap About, and view the version number.

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How to
Turning vibration on my mobile phone on or off
Want to turn vibration on your mobile phone on or off? Follow these easy instructions.
Tap Settings.
Tap Sounds.
To turn vibration on or off when silent mode is turned on:
Tap the indicator next to Vibrate below Silent.
To turn vibration on or off when silent mode is turned off:
Tap the indicator next to Vibrate below Ringer and Alerts.
Depending on the current setting, the function is turned on or off.
Tap the Home key to return to standby mode.