Another great news regarding to the iPhone 5 has appear online, and is the ability to use ONE iPhone in two different carriers, a dual-mode CDMA and GSM iPhone. This information comes from TechCrunch source, a popular developer who says that one of his app shows some logs pointing a dual-mode CDMA/GSM iPhone 5.
According to this person, and app usage logs I was sent, a tiny number of people have recently registered for one of their applications from a single, brand new Apple device that is decidedly dual-mode – meaning it supports both CDMA and GSM.
The logs show that the app has been briefly tested by a handful of people using what is almost certainly an iPhone 5, evidently running iOS 5, sporting two distinct sets of mobile network codes (MNC) / mobile country codes (MCC). Those codes can be used to uniquely identify mobile carriers.
A dual-mode iPhone 5 allows you to use one iPhone in two different networks. For example: you can take your Verizon iPhone 5 and use on AT&T network with no problems and without having to buy another iPhone specifically for AT&T or vise-verse.