BlackBerry Ltd. (NASDAQ:BBRY) Chief Executive Officer John Chen has held talks with the White House to ensure President Barack Obama and other staff members continue to use their BlackBerry devices. BlackBerry Ltd (NASDAQ:BBRY) stock performance was -0.59% in last session and finished the day at $10.04. Traded volume was 9.14million shares in the last session and the average volume of the stock remained 29.33million shares. … Continue reading Diversified Communication Services; BlackBerry Ltd (NASDAQ:BBRY), Oi SA (NYSE:OIBR), Sky-mobi (NASDAQ:MOBI), Novatel Wireless Inc (NASDAQ:NVTL)