I was a user of Aircel from some time but after I started visiting different places I came to know that Aircel didnt have network in Pan India Basis.
Some times it has to latch upon some different service providers like Reliance, Tata etc. So I faced problem because while in roaming I can only use data when I am in home network but here the case is just opposite. While using data my main balance exhausted as it had latched on some other service provider. So go for a trusted provider instead of these new companies.