iPhone Not Vibrating on Silent or Ring Mode? 8 Fixes You Can Try How to make your phone vibrate when it's on silent Asurion Fixed : iPhone Wont Vibrate on Silent Mode (100 % Solved) I have a problem with iPhone Action button. Switching to silent mode when the screen is off vibrates 3x and switching to ring vibrate 1x but the screen doesn't light up. Sometimes, iPhone vibration not working? 9 Real fixes iGeeksBlog Keep Your iPhone From Buzzing When In Silent Mode [iOS Tips] Cult of Mac