Q: Iphone 6 vibrating after fully charged

Hi jmi23,

Welcome to the Apple Support Communities! I'm sorry to hear you are having these issues with your iPhone. I'm a bit unclear on the exact behavior you are describing, but if it is a short vibration that occurs intermittently while it is charging, it is possible that the connection is getting momentarily interrupted at either the charger or the cable connection. If so, you may want to make sure you are using a genuine Apple made or Apple certified charger and cable, and if so you may want to try testing it with a different cable and/or charger to see if the same issues occur. You may find the information and troubleshooting steps outlined in the following articles helpful:

Charge your iPhone, iPad, and iPod touch - Apple Support

Identify counterfeit or uncertified Lightning connector accessories - Apple Support

Regards