Charter and Comcast only get one go at this – getting on to an equal footing with AT&T and Verizon in cellular – so they plan to leave no stone unturned. However the idea that they will take seriously the fairly mouldy old stone of working alongside Sprint – not this time as a pure MVNO, but as a full partner with privileged access – remains a long shot. We agree they must look at it. If the price of getting Sprint and all of its much -treasured spectrum is low enough, it may end up being the right deal for the two to go through with. Already it is fairly clear that if T-Mobile and Sprint merge it will…