Looks like a WP8 handset might be coming to MetroPCS (5th largest carrier in the US). In an interview with MPCS COO Tom Keys he had this to say:
MetroPCS' Keys discusses iPhone economics, VoLTE marketing and more - FierceWireless
A reputable source over at HowardForums has said that the manufacturer that MPCS is talking to is Nokia although he hasn't offered any other details.
FierceWireless: What's your view on Windows Phone 8?
Tom Keys: Windows Phone 8 we think has a place in the portfolio. We're actually working with a manufacturer right now on bringing Windows Phone 8 to marketplace. We think we want to offer it. Similar to what Apple did--you have the iMac at the house, you have the iBook for the office, you have the iPad for the couch and you have your iPhone. If you own the home screen, now with multiple devices, they have a very good opportunity for calendars and sharing content, and this looks like it's Microsoft's opportunity to go there. Secondarily, I think Nokia is going to be the bellwether there for how well it does since they've made a large bet on Windows Phone 8. So at the end of the day, we think it's interesting and competition among operating systems is good for the ecosystem.
MetroPCS' Keys discusses iPhone economics, VoLTE marketing and more - FierceWireless
A reputable source over at HowardForums has said that the manufacturer that MPCS is talking to is Nokia although he hasn't offered any other details.