According to Reuters, The Lumia 610, a budget Windows Phone device, and the global Lumia 900 are both set to get announced next week at Mobile World Congress, in Barcelona. The 900 is set to see a release on AT&T, with no mention of a potential suitor for the 610. Verizon and Sprint are in need of some Windows Phone devices, maybe the 610 or another unnamed device could see an announcement there.
via ~ WPCentral
Source ~ Reuters