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BlackBerry (RIM) has done a lot right with the Z10, the first smartphone to run its new, bet-the-company operating system.

The touch-screen phone -- a version with the traditional BlackBerry physical keyboard is expected, too -- is handsome, intuitive to use and a whiz at multitasking. The key question, which the market will answer, is whether all that will be enough to rescue the company after years of mediocre products and corporate floundering.