No smartphone vibrate sign. Silent mode icon. Vector. 42065673 Vector Art at Vecteezy I have a problem: when my phone is set to vibrate only and someone calls me while it's in my pocket, the vibrations simply fade out. Because of that, sometimes I don't 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 Put Your iPhone in Ring or Silent Mode