Reliance was using CDMA technology and EVDO is a software upgrade to CDMA 2000 1x technology.On the other hand Airtel is using GSM technology. They will have to upgrade their network by installing equipment for HSDPA (3G). So, there will be no wireless broadband service from Airtel for now, that is untill 3G spectrum auction is held by the government. That auction is not likely to happen for another 6 months now, if it happens at all.