...Ahead of Verizon
Out of nowhere, Wired's editor in chief editor Chris Anderson wrote the following in a <a href="http://twitter.com/chr1sa/status/23868435595">Twitter update</a>: "A T-Mobile manager casually mentioned to me that they're going to get the iPhone 3GS (but not 4, oddly) later this year. Common knowledge?"
Certainly, we've seen more non-AT&T iPhone rumors than you can shake a stick at. It's common knowledge that these rumors are floating out there. Everyone has learned to be very skeptical of everything until an official announcement is made. But knowing Apple, an official announcement won't come until the phone is actually available. But that's a very tough secret to hold on to through to the end.
A T-Mobile iPhone would of course be much easier to create. That's because T-Mobile and AT&T use the same wireless network standard, a technology known as GSM. Verizon and Sprint use a different tech called CDMA, and to have an iPhone compatible with that format would require going back to the phone and actually change all the innards of the device.