Yesterday, i was just playing with computer, received SMS from one of my friend who never send me SMS before (he was bit money saver). I was in shock that he sent me SMS !! . but soon i came to know that Airtel Servers are down. and money is not deducted from Balance. (Even it was not showing the balance)
Airtel , one of the biggest GSM service provider in India was down that day. Actually whole airtel was not down but there money server was down. All calls and SMSs were free (They are still free while writing ...