Encourages customers to share their moods and feelings by setting their favourite songs as ringback tones Airtel Hello Tunes is FREE for all Airtel customers through Wynk Music app . Mumbai, July 24, 2020: India’s leading music streaming platform Wynk Music from Airtel has launched an innovative campaign #ExpresswithHellotune, to enable customers to  share their current moods and feeling with friends and loved…