Make sure you are on your home screen. Then tap on the settings application.
Once in settings, click sounds.
Tap on the desired category you want to change like "Ringtone" or "Text Tone."
Scroll to the top of this page.
Select the top option, "Vibration."
Select the desired vibration (will play preview when pressed). Or customize it by tapping "Create New Vibration."
Click your home button and it automatically saves!
The End! Good job phone geek!(: