Allow me to start off by saying I have no idea how reliable these rumors are; according to a ‘source’ the exclusivity of the Lumia 900 to AT&T is only a temporary matter; in fact only 45 days (starting on March 18th). According to the source once the exclusivity period is over Nokia will release a modified Lumia 900 with 12MP Camera to all carriers (compared to the 8 megapixel on AT&T’s model) in May.
According to rumors, the Windows Phone Nokia Lumia 900 will hop on to other networks such as T-Mobile, Sprint and Verizon too.
It is reported that Nokia will be working with the carriers on launching different versions of Lumia 900. Most probably, some other improvements will also be included in the mix. Stay tuned for more on this.
Via – WinSuperSite