When I purchase Aircel 3G sim card then feel so happy because my friend suggest that it is too faster that is why I purchase when I doing my office work such as transfer money to investor then these are very critical position their no problem in the internet because it found then you lost the money a beat a same condition I face my transaction page is facing error due to show internet connection I lost 5980 rs. It's just wastage only not a network.
So my 5 month experience with my personal opinion that don't buy it use any other mobile network operator.