Sprint did start the Clear build out. Chicago was one of the first cities and then was shut off/sold to CLEAR under that deal. Dan may have not made the Nextel deal, but he left it go on in its past/current state without slowly moving those customers over to Sprint until very recently. So yes that is his fault and problem with that. He could have easily stopped offering Nextel to the public and anyone wanting to renew their Nextel contract could have been moved over without any problems without the extra $10 surcharge that Spent should be sued for.
And as far as their towers. They were using their own towers before. Nextel was on many Sprint towers. NV isn't doing anything currently for much of the country. He should have done this before buying the iProducts fanboys.