It is confirmed that Verizon iPhone 5 is indeed unlocked. The iPhone 5 works on Verizon’s LTE networks fine, besides the nano-SIM slot also supports other GSM carriers such as AT&T and T-Mobile. It has been tested that the Verizon iPhone 5 is fully compatible with AT&T’s and T-Mobile’s 3G networks. Because of different LTE bands, you probably can not get high speed connectivity.
The Verizon iPhone 5 comes unlocked direct out of the box. You dont need jailbreak, unlocking process or even calling customer support for unlock code. Its seems too much to believe in. But CNET and iDownloadBlog confirmed it already. So all Verizon iPhone 5 even with contact is being delivered unlocked and works in GSM network too. And it seems not only AT&T and T-Mobile but also all other mobile network should work too. But none other carrier then Apple partners’ have Nano-SIM so far. Even T-Mobile dont have nano-SIM yet. T-Mobile is reported to bring Nano-SIM in October. So, even its unlocked none will find any nano-SIM to work with. There will be nano-SIM converter or some sort of solution very soon, but till that you have to wait. Check the video below.