Kareena Kapoor remained glued to her cell phone when not shooting for Reema Kagti's untitled film along with Aamir Khan. Bebo can't do without her mobile and she is constantly either messaging or calling people.

This picture was taken over the weekend during the shoot at Lower Parel at 4 am. Wonder who she was messaging at that unearthly hour? Exchanging lovey-dovey messages with beau Saif Ali Khan, perhaps?

PSST... Cell phones have been banned on the sets of Kagti's film as the big names associated with the project (especially Aamir!) don't want any pictures of the shoot and look to be leaked out. Guess the stars are exception to the rule!