it started from taking a picture with Google Camera using Lens Blur mode..
it doesn't work at all, it always says "device moved so fast" and i'm not even moving the device at all
so i get into the service menu *#*#7378423#*#*
then Service tests > Gyroscope
and i found it rotating all time and numbers are continuously changing even if i put the device on table
so i thought of calibrating the sensor but i found nothing about that
Any Suggestions ?!!