Aircel mobile operator gives very good offers but should work on their network. I used it for four months but after facing problem in network I have to dump it. They provide good offers and good service but I have to say that their network is not at all good. The internet speed is very bad. It takes 3-4 min for downloading 1mb of data. I will not recommend it to anyone who want the sim for using internet. And its calling is also not so good. When I call, it shows full range but the opposite parties says that we cant hear you clearly.