When Stephen Elop went on stage to show the Lumia 900 to the world, he also said that the device will be an AT&T exclusive, without mentioning whether it was a permanent or a temporary exclusivity.

According to the recent rumors, it appears that the exclusivity is indeed a temporary one and it will be in place for 45 days. After the temporary exclusivity ends, other carriers — “T-Mobile (and probably Verizon, possibly Sprint)” — are free to initiate talks with Nokia about bringing the Lumia 900, a variant or an upgraded version to their network sometime between the half of 2012 and Q3. The upgraded Lumia 900 is believed to have a twelve-megapixel camera instead of the eight-megapixel one currently headed to AT&T. Maybe this is what the company had in mind when we were told about Nokia preparing exclusive Windows Phones for each U.S. carrier?

Source: WinSupersite