You would think the fourth U.S. iPhone 4S carrier would be T-Mobile. But, because of network incompatibility, it's not. It's actually C Spire Wireless, formerly known as Cellular South, a CDMA regional carrier that most people probably haven't heard of unless you happen to live in Mississippi or parts of Alabama, Florida and Tennessee.
It's not surprising that Apple is starting to push the iPhone toward regional carriers now that the exclusive deal with AT&T is a distant memory. As stated during Tuesday's earnings call, CEO Tim Cook said he wanted to get the iPhone 4
