This is/will be sold for nextel customers as the v555 version (don't ask where or how I know this) so does that mean it's unlocked? If I can put my NEXTEL sim in it, theoretically i could put a boost, t-mobile, cingular, etc. sim in and use it, right? Hmm... Any one know if/when this comes out or has come out for Nextel and where to find it? Or know anything about this?