Tata Docomo is a cellular service provider in India operating on the GSM platform as a result of a strategic joint venture between Tata Teleservices and Japanese telecom company NTT Docomo. The document provides an overview of Tata Docomo, including its vision, services offered, areas of operation, and partnership with NTT Docomo to introduce advanced technologies and services to India. Key responsibilities during the internship included understanding Tata Docomo's unique customer service model and activities to improve customer satisfaction.