Ponmayilal
Attitude matters
On the modem subject, I suddenly remembered something. When Dlink released their ADSL modem 502T in India , lots who purchased the same for connecting to BSNL Dataone had problems configuring it.They were required to take it to the nearest Dlink service center who will apply a patch and make it workable.It had something to do with the MAC address of the modem.The patch to change the MAC address was also available in some forums. Later models of the Dlink modems released later came with the patch applied and did not have this problem. I presume that the Netgear modem you have now may have the same or similiar problem.You can borrow some other modem from your friend configure it and try. If it works fine with XP and Vista you can ask Airtel to replace the the Netgear modem. Even otherwise you can ask the Airtel people to change it to another make modem since you suspect there is a problem with the Netgear modem.