I just replaced my last iphone because the touch screen stopped working. This new phone locks up or freezes while "asleep" in my pocket and when I pull it out to make a call the screen is black and pushing any button will not wake it up/turn it on. I have to do a hard reset by holding both buttons for 10 seconds to reboot it. This is happening about once a day and it's a PITA. I've tried a restore from itunes and it didn't make a difference. The phone is unhacked and not messed with in any way. Anyone else having this issue? Anything I can do to fix this or should I take it in to my apple store for a loaner/exchange? I'm starting to think these phones are glitchy having 2 now with problems.