Hello I have been using RPG postpaid connection in Chennai for about 6 months..Actually I got pissed off with that service becoz per month I get about 10 wrong calls...I was very disappointed and decided to switch to airTel..So I just bought a pre paid connection first..hey man its really cool yaar...Unlike RPG here u get free STD and ISD facility without any deposit man..Infact SMS and emailing facility is also available..Also nowadays everytime after a call the remaining balance flashes in the screen..THE MAIN THING IS U DONT GET WRONG CALLS..since the number they give is not an old number like RPG...so I say AIRTEL IS THE BEST AND THE ONLY BEST..Hey I forgot the customer service is too friendly yaar