Another official added that since older telcos - Airtel and Vodafone Idea - have been using the administratively assigned backhaul carriers for a long time, they want to continue using the same frequencies and in case of an auction, that won't be guaranteed. However, Jio, being a new entrant, does not have the legacy backhaul carriers and has a much higher level of fiberization of towers. Hence, it wants all types of airwaves to be allocated through auction, the official said. Jio, Airtel and Vodafone Idea did not respond to ET's emails seeking comment.