BlackBerry (BB -0.76%) began selling its new Z10 smartphone in the U.S. on Friday. While the phone is very impressive, in this video, Motley Fool tech and telecom analyst Andrew Tonner gives investors one unfortunate reason why this phone will never challenge the iPhone: It's just too late to the game. Andrew tells us more about the phone and how well he expects it to do in the U.S. market.