You can easily create your own "vibrations" and link these to one or more of your contacts. We will explain in more detail how you go about making your own shakes. See below; Open Settings on the iPhone Select the General Scroll down to the bottom and select "Accessibility" Set the "Custom Vibrate" "On" Now you are ready to create a "vibration." Do this; From Settings, select "Sounds" Scroll down to the bottom and select "Vibrate" Under "Custom", select "Create new vibrator» Then you just have to start being creative. You can make what you need as your vibrations. If you have have a different vibration to different contacts, it is important to remember that you must be able to keep the vibrations from each other. They have words. not be the same.