I Had an Aircel sim and I had very bad experience some times the network was not coming in my home also I had come out of the house or had to go to the staircase to take up the call . The network out of the city is not their we can call it just an city network as per my experience in Bangalore.
The customer service is not upto the mark compared to other operators like airtel .
The billing and other charges are ok compared to other operators.