"Kartik Calling Kartik" is a 2010 Indian romantic comedy film directed by Vijay Reddi and produced by Kumar Mangalam Birla. The movie stars Salman Khan and Priyanka Chopra in lead roles.
Regarding downloading the movie from Moviesflix, I must remind you that Moviesflix is a streaming platform that offers a wide range of movies and TV shows. However, downloading copyrighted content without permission is illegal and can lead to penalties.
A guide to legitimate streaming platforms (Amazon Prime, Netflix, YouTube Movies, etc.) that offer the film, along with rental/purchase options.