- Bharti Airtel is India's largest cellular service provider, known for its service and pioneering moves like setting up the first cellular showrooms and installing a second mobile switching center. - It entered the telecom business in 1985 through technical collaborations and launched services in Delhi in 1992. It has since expanded through acquisitions and alliances while winning several awards for its services. - Airtel has repositioned its brand multiple times over the years to target different customer segments like the elite class initially and later the mass market, with taglines like "Touch Tomorrow" and advertisements featuring celebrities like Sachin Tendulkar.