I have an iPhone 4 that I bought off of eBay. It came but with one problem. It has a jammed power button. You can still click it, but with some force. I heard that this is a problem that came with the newer made iPhone 4's. having checked its warranty status, it has Apple coverage that the person bought for it until June 2012. Will they fix it for me if I go in to the Apple Store or maybe even give me a new one? I currently do NOT have an account with it. It is not jailbroken or unlocked, it just says "No Service". Will they help me?