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Does my Samsung Droid Charge support haptic (vibration) feedback?
Your mobile device can be configured to provide you with haptic feedback, using the device’s vibrate function. Instead of sounding a tone when you touch the screen and input is accepted, the device will provide short pulses of vibration that you will feel, indicating that the action requested by your touch input has been accepted. To turn on haptic feedback, touch Applications > Settings > Sound settings and then touch Haptic feedback to turn the feature on or off.