I apologize if this has been posted before -- I couldn't find anything this time around, but a couple weeks ago, I remember reading something about this. I am about to upgrade to an iPhone 5s from my existing 4s (on Sprint). However, I do not use it enough to justify the (opportunity) cost, really, so I want sell it, probably on ebay. However, in order to get the highest price, I would like to keep it completely in the packaging. Is this possible? Can it be activated by Sprint before shipping somehow, or must I open the packaging in order to activate it before selling?