4s keeps restarting after IOS7
I upgraded my Iphone 4s from IOS6 to IOS7 just a few hours ago.
Right after that, it started restarting after a 5 minutes of use, or so.
Besides, when restarting it seems it does not go off as it should, because the screen abruptly shuts down.
What do i do? what's the problem?
God, I don't even have Apple's tech support in my country.
Thanks in advance.
iPhone 4S, iOS 7