Hi. I have hairline cracks in my iPhone 3GS and heard it can be replaced through Apple. I don't live close enough to an Apple store to get there after work before they close during business hours, so I plan to send it in. Does anyone know the turnaround time for receiving the new phone after sending in the old one? Or do they send the new one and a box to send in the old one? I'm not quite sure how it works. Let me know your experience. Thanks.