This document is a project report submitted to Punjab Technical University by Harish Kalia on customer perceptions of mobile service providers in India after the introduction of Mobile Number Portability. The report includes an introduction to telecommunications in India, the major mobile service providers (Airtel, Vodafone, BSNL, Idea), and Mobile Number Portability. It outlines the research methodology used in the study and presents an analysis of survey data collected on customer satisfaction, perceptions, and the impact of Mobile Number Portability. Tables and figures in the report provide details on the results of the primary research.