^ i purchased RUIM sim separately for 350rs.And evdo modem seperately.I get evdo speeds.I first bought a modem from ebay (mts ac2766 unlocked) since there was no stock in bsnl csc.later i got prithvi modem.As far as i know evdo modem is what needs to be registered properly(bsnl people should have already done that),nothing to do with the sim.