I was a Aircel user for about 3 years and I was one of the first in my area to switch over to aircel . it was very great at the time of launch . they had the best offers in the market to offer . I thought they will become the most used network in the span of 2 years . they had the fastest network on 2g at the time of their launch then other network providers but after 1 year they started showing their true colors. the company network started to decrease after sometime their edge network become gprs and that lead to their downfall.
The network provider started decreasing and their offers becoming less and . their network quality decreases while travelling from one city to other . their network indoors is also poor balance gets deducted for no reason and customer care call does not get connected at all and the amount unnecessary calls you receive for caller tunes is quite large so all in all I should suggest you to not use aircel as it is cheap but their services are not upto the mark