I had been using Tata Docomo Wireless dongle / 3G data card for a few months and my experience is not so good with it.
Speed of this ISP is not as promised and there’s always problems with signal strength i.e. the reception is not equal even within adjacent rooms of your house.
Due to the signal strength the connection couldn’t be something I could rely on.
The ISP’s service and support, however, was above average but that only being good doesn’t suffice.
Furthermore, the charges are too high as compared to the amount of data and the speed provided with different plans, and just the ease of mobility or portability of Internet usage shouldn’t be a justification for such a high price!