A R Rehman is arguably the best music director around and Airtel guys did a coup of sorts by getting him to do a commercial for him because I havent seen Rehman in any other commercial as yet.
The Ad itself is nice and good... Rehman composes a tune by collecting various sounds and sending it to his studio via a Airtel Phone. The tune also available for download as a ringtone is nice.
Overall the ad is good and I liked it. I would also like to see perhaps A R Rehman composing a few more of the tones because his tones are nice.