In an interview with Reuters, Verizon Chief Financial Officer Fran Shammo said his company's version of the next Apple iPhone, the so-called "iPhone 5," will be a global phone, working in the same countries as the AT&T model.
That would mean the Verizon iPhone 5 would be able to make calls on both CDMA and GSM networks. The device would still be native to Verizon's network, using GSM only when roaming. The AT&T version might also have both radios, though it would only need GSM to be considered a global phone.
The current Verizon iPhone 4 is CDMA-only, so it doesn't work in countries where there are only GSM networks, which includes most of Europe, Africa, and parts of Asia. The AT&T version works on most GSM networks, which are much more common.
Shammo also said Verizon would be able to launch the iPhone 5 at the same time as AT&T, all but confirming a simultaneous launch on both carriers.