Doesn't make sense for Sprint to have exclusivity only for iP5 for 6 or 12 months: what happens after iP5 exclusivity, in the 2nd, 3rd, 4th years of the 4-year commitment?
Does Apple commit itself to giving Sprint iP6, iP7 & iP8 exclusively to Sprint?
Sprint may well be willing to bet its future on iPhone, but is Apple stupid enough to bet its future on Sprint? I don't think so.
They might, just like the did with the Pre. I'm not say I believe this to be true, but of course it is a possibility.
http://www.wired.com/gadgetlab/2009/02/palm-pre-exclus/