Use Airtel mChek at various way like-
1)Pay Postpaid Bills
2)Recharge Prepaid
3)Money Transfar
4)Buy Flight,Movie Tickets
5)Pay Insurance Premiums
6)Purchase Online

Many Handsets do not support the application..But if u hv a money account card So can use it via smsing !

Sms 'Airtel' to 543219.

Or