Bcoz bandwidth constraint is not the reason for delay in addition of pending Viacom18 HD channels neither is there is any other dispute between broadcaster and airtel..... Have already explained the logical reason earlier on at various occasions, unless New Updated RIO agreement is signed wherein there r changes made in LCN placement of various channels in respective slabs which r agreed upon in the agreement by Airtel then only these channels can be accommodated at desired LCN slots else currently as per my understanding adding these channels alongside their SD feeds will violate RIO terms signed with other broadcasters ....... At that time u will also see Colors Cineplex HD being shifted alongside its SD feed