Like most iPhone 4s users, I've notIced that the battery is significantly worse than the iPhone 4. Also I've charged my phone atleast 5 times the last week and in my settings-usage-time since last full charge, it doesn't display anything and says it will Once iPhone is fully charged which I have done many times. That is the only issue and I really want toget my phone replaced .. Because I have a little scratch in the back How can I get it replaced?