Once LTE is rolled out on 1900, 800, and 2500 what is Sprint - assuming it owns Clearwire - going to do with WiMax towers/equipment?
1) Is it costing them much to simply "keep the lights on" for the declining number of WiMax people?
2) Is it "costing" them in terms of occupying spectrum that could be used for LTE?
3) At some number of users - 5 mil, 1mil, 100k, etc. - will Sprint decide it's cheaper to do a device exchange for LTE-equivalents instead of maintaining WiMax?
4) Once someone's contract is up, does Sprint have the legal right to simply stop WiMax service? Would they do something like that and risk customer backlash?
Also, how would the answers to any of these question differ if Sprint does NOT own Clearwire outright but instead is left with a 65% stake?
http://www.fiercewireless.com/story/softbank-ceo-sees-no-need-sprint-raise-clearwire-offer/2013-05-01