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 Not Vibrating on Silent after iOS 26 Update? Here's Fix How to Turn on Vibrate on Silent CORECOLOUR AU Create Custom Vibrations for Contacts on Your iPhone to Feel Who's Calling or Texting << iOS & iPhone :: Gadget Hacks How do I switch vibrate on when my phone rings or I receive messages? I noticed my last phone had stopped try to fix the issue but nothing, I've just upgraded to How to set vibrate only alarm or timer on iPhone with no sound