How to Make iPhone Vibrate or Not Vibrate on Silent Guiding Tech How to Make Silent Mode Vibrate on iPhone Cool phone tip I just learned You can keep your phone on silent and still hear calls or texts from specific people like family, close friends, or co commanders . Here's This tiny component inside your phone is responsible for every silent alert you feel. Its called a vibration motor, and when it spins or oscillates at high speed, it creates controlled vibrations iPhone Wont Vibrate on Silent Mode (FIXED)