Written on the wall of where Chameli and Aman first meet is some graffiti that reads "AIDS se bacho!" in Hindi, which in English means, "Save (us) from AIDS!"
When Chameli lights up the cigarette in the 1st scene she is using a AIM brand match box of yellow color, but in the next scene when brings up the cigarette with match box it turns to SHIP brand of match box of red color.