Guys , i have IPhone 12 , i activated vibration while silent , bas el Mobile ama byrn w howa silent msh bi VIbrate khales , any ideas ?! Cell phones vibrate using a small motor with a weighted disc that spins quickly. As the disc moves, it creates tiny shakes that you feel as a vibration. This helps you get alerts without sound. The iPhone is not vibrating when in silent mode, haptics being on. : r iphonehelp The vibration feature doesn't work on your iPhone? Here's how to fix it!