I have the iPhone 4S on Verizon, and I'm still within the 14-day time period where I can terminate the contract without paying the termination fee. I want to switch back to AT&T (where I had used the iPhone 3G for 3 years), and wonder what's the easiest way to do it? I know when I ordered the iPhone 4S on Verizon from Apple.com, I just entered my phone number onto the website, and Apple took care of everything for me. I didn't need to call AT&T and cancel my service. So can I now just call AT&T and ask them to reactivate my service on my same phone number, and not bother calling Verizon? And then I can go return the iPhone 4S at my leisure (before Apple's 30 day return period ends)? I'm not sure if I can do that, because I'm looking at the Verizon Service Agreement that I signed, and it says I need to return the iPhone to Apple and then contact Verizon to cancel the service. It also says that the service will not be canceled until Apple receives the iPhone.