Airtel is a best service before there was a network problem but now no problem with network they have recovered it. Customer service is also a good they give good service but not all the time some time it has a problem in connecting a call. Charges and recharges are little bit costly but according to service and network they are not high. all charges are reasonable and affordable by everyone. any one who looking for new sim I prefer them to buy or to have Airtel network. According to me airtel is best network in all over Hyderabad.