So, I have T-Mobile but I want to switch. I ordered the iphone online at buyiphone.apple.com. As part of the process they ask if you want to transfer a number, so I entered all the details of the number I wanted to transfer over. After that you go through the process of buying my phone. Now, I assume when my iPhone is delivered and I connect it to iTunes it'll confirm (or it'll ask me again) about porting over my old phone number? Is this correct?