Kabir Khan and author S. Hussain Zaidi had come together to collaborate on Kabir 's then untitled film , based on the scenario post-26 / 11 Mumbai attacks with Saif Ali Khan and Katrina Kaif signed in leading roles . The screenplay of the film is an adaptation and is co-written in conjunction with Hussain 's then unreleased book . The film earlier had a working title as '' Daniyal Khan '' , before being titled '' Phantom '' . Saif Ali Khan and Kaif have reportedly learnt Kurdish and Arabic for their roles . The plot of the film weaves a fictional story to kill the perpetrators of 2008 Mumbai attacks - Sajid Mir , David Coleman Headley , Zakiur Rehman Lakhvi ( named as Sabahuddin Umvi ) and Hafiz Saeed ( named as Hariz Saeed ) . The film also depicts incidents similar to the Assassination of Mahmoud Al-Mabhouh and Boston Marathon bombing . Kashmiri Sufi singer Qazi Touqeer featured in the Afghan Jalebi song
Boston Marathon bombing
Boston Marathon bombing
Phantom (2015 film)