Hey every1, So my first iPhone had a dead pixel and some dust behind the screen. Took it back to the Apple store and they replaced it no problem. Started using my second iPhone yesterday and it locked up twice. The second time it gave me the yellow triangle and said "connect to iTunes". I had to restore the phone and thought all was well. Today it locked up two more times. Should i return this one and get it exhanged for a third one and hope it works 100% this time?