There are a few ways to make your iPhone vibrate when you type. One way is to use the “finger scanning” feature. This feature allows you to scan your finger across the screen and the iPhone will vibrate in response. Another way is to use the “finger tap” feature. This feature allows you to tap on a spot on the screen and the iPhone will vibrate in response. Finally, you can use the “finger swipe” feature. This feature allows you to swipe your finger across the screen and the iPhone will vibrate in response.