Why you think your phone is vibrating when it is not Why Is My Phone Vibrating Randomly? Here's What It Means and How to Stop It Boston Mobile Phone Repairs 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 MS and Vibrating Sensations: What Do They Mean? MyMSTeam