Unknown vibration

[Buted]

Hi.. My xperia z ultra suddenly vibrate for no reason. Anyone know why?

[Uliwooly]

@Buted

Does it happen while using the phone or even with the screen locked/off? if the later, boot on safe mode and check again

http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008

[_alexdon_]

Is it regular or only from time to time? Yesterday I did encounter a strange vibration and it was gmail not able to sign in.

[_99]

Same problem.. I was listening to music and then suddenly it started to vibrate. It vibrated about 4-5 times and then it automatically stopped.. Do anyone knows what is happening???

[_alexdon_]

@_99 Have you checked my above reply? You can also boot in safe mode mode and see if that will occur again.