iphone crash! *OH NO!*

Well, it's partly (id not mostly) my fault that my iphone crashed. I was erasing all content and resetting all settings (to sell it because we no longer need cell service) and I decided to turn the phone off because it was going to take too long and I needed to take it to the AT&T store for them to take the SIM card out... long story short my phone wouldnt do anything for 2 hours and thank goodness apple aupport helped me by phone because someone already paid for it on ebay!!!