JWT has been Airtel's advertising agency since 1987. In 2010, JWT helped Airtel rebrand by designing a new lowercase logo and launching the tagline "Dil jo chahe, pass laye" with a song by A.R. Rahman. JWT's campaign for Airtel's new 3G services shows a couple bidding goodbye through a mobile video call. The rebranding cost Rs. 300 crore and emphasizes emotional connection through emphasizing EQ in campaigns for services like Airtel Money and Airtel Music.