The anti-Sprint
One danger for Sprint right now might be the possibility that their subscribers switch to AT&T. AT&T has setup their customer service, at least for new iPhone users, to be a first class customer experience:
--What's this follow-up call stuff?
--Waiting in the call queue less than 5 minutes.
These things may not be all that special, but I has to leverage social media to even get to this level of service with Sprint. The biggest danger is that a new iPhone convert from Sprint may gush so much over the 1-2 punch of better service and a pretty cool new phone that he may take some of his calling circle along.