In the worst mobile network category may be Aircel stands in top .
Yes friends I have used this network sim for couple of months and call quality is very bad and internet speed works as 2g thougho it states as 3g.
Always we should try two or three times to call a person and always its states person you are calling is busy .
The net speed is very slow to operate and iritates while operation .
I dont know the magic of aircel that my balance was decucting automatically without any call or message.
I am feed of up of this and I finaly destroied this sim and started to use docomo.