Just, mah two cents:
We all need the experience of a person who doesn't gripe about the inconvenience. I think you should return it, be gracious about it, just receiving a full refund and asking if they can provide you a solution for the time being. I wouldn't demand this, that, or the other, just what you are owed back for the material cost of the phone. There are always inconveniences, but you know, maybe you can just be gracious about it. They made a mistake, the guy who sold it is probably is concerned for his meager job at the Best Buy. You were our hero (lol) for walking out with it. Go be theirs by doing what no one thinks you should have to do, but because they gave it a shot to ask for it back. Good luck. Can't wait to read the rest of the story...Paul Harvey much?