Hello Guys!
Maybe you know something the technic about the mobile.
My mobile will automatically restart, i just do nothing wrong, it just restart.

More details:
I make my mobile on -> i write my PIN (At this moment it can restart too) -> I am on it and can do what i want -> wait a little bit -> change to blackscreen ( automatically ) -> restart -> mobile is on. And this happens all the time again.

Do you know how to fix it?
I don't know why, but it maybe need a new battery..?