BB soon to be given up for dead.BlackBerry Ltd. (NASDAQ:BBRY) continues its cross-platform strategy with BlackBerry Messenger (BBM) for Windows Phone. The Canadian mobile communications company will officially roll out the BBM for Windows Phone next week. On last trading day BlackBerry Ltd (NASDAQ:BBRY) plunged -1.06% to close at $10.27. BBRY is -15.68% away from its 52 week high and is moving 88.79% ahead of its 52 week low. BlackBerry Ltd (NASDAQ:BBRY) return on investment (ROI) is -8.45% while return on equity (ROE) is -8.67%.