I have using aircel sim of many years. after few time aircel sim network is very weak. I have not receive any incoming calls. anyone has call me then not connect to me. the issue is your number is out of coverage. I was complain to cutomer care and share my problem then his reply was " we have problem in my system so call again after one hour". service is very poor in telecommunation. I am irritated with his network. customer care not solve customer problems.