The major high speed mobile broadband deals in India are provided by Reliance Netconnect, Tata Indicom Photon+, Virgin Mobile, BSNL and MTS. When it comes to the price of USB modems, almost all the ISPs are have almost the same price of around 3500/-. Coverage wise, Tata Photon emerges the clear winner although we are not sure about the BSNL EVDO coverage. When it comes to data plans, BSNL is the clear winner here with 650/- for unlimited data transfer, but the speed is 2.4 Mbps when compared to 3.1 Mbps offered by others. Personally i consider this to be not much of a difference.
If you are a frequent traveler, we would suggest you to take Tata Photon+ as it has the best coverage in India.