Can I use a Virgin Mobile handset on another provider's network?
From HowardForums Wiki
It is possible to use a Virgin Mobile handset on another provider's network if the handset is flashed to work with that provider's network. Since all Virgin Mobile USA handsets have CDMA capability, the best chance for success in converting a handset would be to another CDMA-only provider
Pocket Wireless stores can flash Virgin Mobile USA handsets to work with that service.
