After Rizwan encounters Dr. Faisal Rehman at the mosque around August 2008, he uses a phone booth to call Zakir and Hasina. Although phone booths have become increasingly rare in North America due to the popularity of cell phones, they did not cease to exist until after 2013.
In one scene, before 9/11(2001), they show Sam and Khan playing on an Xbox 360 (they were holding wireless 360 controllers) The Xbox 360 was released on November 2005.
Sameer is shown playing with a video game player, the Sony Playstation Portable or PSP (at around 29 mins) before the marriage and Sept 11, 2001. However, Sony released the PSP in Japan on December 12, 2004 and in North America on March 24, 2005.
Multiple times during the film, language is used that would not used in a Midwestern American town. One example being the use of the term "bloody" in the style of British English usage by youths while harassing Mandira's son.