So it finally happened--Amp'd Mobile has shuttered its doors to the world (or at least it's close to doing so). Along with a handy FAQ on its site on how to handle the transition, it appears that Amp'd Mobile is also attempting to bridge a move to Prexar Mobile, which is USA Telephone's mobile division. Prexar Mobile has apparently bought out certain portions of Amp'd Mobile, prompting the customer switch. Former Amp'd customers can keep their phones and numbers, and they'll want to switch over to one of Prexar's voice plans, which range from $40 to $180 per month. We're guessing that won't include all that Amp'd Mobile content, obviously. Could this be Prexar's play to get more visibility? Perhaps, but we don't know if it'll work out in the long run.