Switching providers
I'm on T-Mobile now. If I preorder the iPhone 4 and get it on July 14th, at what point do I officially transfer from T-Mobile to AT&T? Is it when I activate it, or do I have to worry about some interim period during which I might not get any cell phone service?
MacBook Pro, Mac OS X (10.5.2), 2.4 GHz 4GB 667 MHz SDRAM