"Changez" is a Pakistani version of Genghis, from Genghis Khan.
According to Mira Nair, on the first day of shooting in the tea shop, one of the main actors in the scene refused to say their lines the way that had been previously discussed and rehearsed. This forced her to frantically rewrite the script in a race against the shooting schedule. While she did not name the actor specifically, it can be assumed that she was either talking about Liev Schreiber or Riz Ahmed.
With the exception of a few establishing shots, Pakistan was barely used for the shooting of the film, and instead most of the locations were recreated and shot in India.
Shahid Kapoor was considered for the role of Changez.
Even though the brand logo is purposely matted out, the DSLR camera used by Erica (Kate Hudson) is the Canon EOS 5D Mark II.