We finally have at least one carrier for RIM's new flagship tablet. The BlackBerry 4G PlayBook, as it'll officially be called here, is coming to Sprint this summer. And as you might've guessed, it'll run on WiMAX.BlackBerry 4G PlayBook coming to Sprint network this summer, obviously 4G compatible originally appeared on Engadget on Thu, 06 Jan 2011 00:01:00 EDT. Please see our terms for use of feeds.