Dear Chandrasekaren,
Yes, you are right, The same wireless broadband data card available in two ISPs ( as per my current knowledge) in our nation dealing with several ISP since the internet era.
1. BSNL , Service name EV-DO , (not in High Speed Internet, It will only give 144Kbps). So ask EV-DO service in near BSNL Exchange. The EV-DO give minimum 256 Kbps and maximum 1024Kbps depend on network load in wireless mode. Per month 550/- in unlimited plan. Buying in rental is best of you. Also roaming available in selected city, But future nationwide roaming is possible. If EV-DO is not available, you can get 144Kbps from near BSNL tower CDMA 1X service without any cost. More info on http://bsnlevdoclub.com and BSNL's link here
FYI : Areas in chennai - 1. Poonamallee, 2. K K Nagar, 3. Porur, 4. Sriperumbudur, 5. Chemanjeri , 6. Perungudi, 7. Maraimalai Nagar , 8. Kelambakkam, 9. Keelkottaiyur, 10. Mathur,… more areas as soon as possible.
2. Tata Indicom , Service name Photon, But they are charging tooooooooooo much compare to BSNL's service. They are cheating with us 1500/- per month in the same service and we need to spend another 3500/- for modem purchase. If the modem failed after one year we need to buy another modem from Tata Indicom. No details about the service area and roaming. But my personal knowledge 1. Chrompet, 2. Tambaram, 3. ????? That's all the truth about the Wireless Broadband Service in chennai.
I don't know where you in chennai, So i gave all area from BSNL. If you need any more details about the device just ring me on my mobile. 94420.93300. Take care.
with care and love,
Muhammad Ismail .H, PHD,
Note : Me too a satisfied user of the BSNL's EV-DO service in last 7 months. I am paying only Nett 843/- Per month and got connected 24x7 in 365 days.