Hi, my iphone's battery goes down really fast and i am thinking of sending it in. I have the 3GS iphone but the only problem is that i unlocked it and bought it off ebay. It was used for 3 weeks. I know i will have to restore it. But how will they handle me sending it in to the store since i bought it at ebay and have a tmobile sim in it. I will obviously take the sim card out. Will they replace for a new one? or what will they do?