Vibrations in Phones: How Do They Work? | iGotOffer
Vibrating Mini Motor Disc : ID 1201 : $1.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Phone vibrate flat icon on transparent background. Smartphone with blue screen in silent mode. Symbol on vibration mode sign for web. Vector Stock Vector Image & Art - Alamy
Why you think your phone is vibrating when it is not - BBC Future