A couple of months ago my iphone4 started freezing after i would try to unlock it. it went away after a couple days and just starting yesterday it started doing it again. i left it off all night, woke up, turned it on and its still doing it. Anyone have any solutions to this problem? thanks

P.s: im currently restoring it on my laptop. Ive also tried to restart it multiple times by holding the home/lock buttons.