Nexus 5 with a prepaid carrier can now look towards Ting. Ting is an MVNO style carrier known for their low-priced plans. In this case you pick what you need for minutes, messages and data individually with options for each ranging from XS to XXL. As for the Nexus 5 though, for now that would need to be purchased direct from the Google Play Store.
MVNO carrier that uses the T-Mobile network. At present they have several calling plans available, however as of today they will be launching yet another. This new plan will debut with the lowest price of all the Ultra Mobile plans. The plan will be $19 per month and is being touted as "entry point plan for casual mobile users."
Galaxy S4 later this evening, however it looks like at least one US carrier has gotten a bit of a head start. That carrier is Ting, an MVNO, and they have said that the Galaxy S4 is inbound. Well, actually they have said that they will be "able to offer the follow up to the Samsung Galaxy S3 which we’ll call the Samsung Galaxy S4."
Republic Wireless is a new Mobile Virtual Network Operator that uses a combination of conventional cellular lines and Voice Over IP via Wifi.