Why does my Nokia Lumia 635 began to vibrate without reason?

[Windows Central Question]

My nokia lumia 635 began to vibrate without reason

My nokia began to vibrate without reason and put on the black screen

 

[richard mueller]

Re: My nokia lumia 635 began to vibrate without reason

My 635 has done this twice to me. All I could do was remove the battery then reinstall and power up. Everything good for quite a while, no data lost.