This document provides an overview of payment systems in India, focusing on IMPS (Interbank Mobile Payment Service). It begins with defining payment systems and their role. It then discusses existing electronic payment systems like ECS, NEFT, and RTGS. It introduces IMPS, describing its objectives to make mobile a payment channel. It explains the process flow and various transaction modes of IMPS. It covers transaction limits, fees and use cases. It compares IMPS with other payment systems and discusses emerging trends like mobile wallets. The document aims to educate about IMPS and the evolving landscape of digital payments in India.