Research In Motion Ltd unveiled on Wednesday night the long-delayed line of smartphones it hopes will put the company on the comeback trail in a market it once dominated, but said sales of the BlackBerry 10 in the United States will not start until March.

Long road ahead: The new BlackBerry 10 mobile platform being unveiled in New York. The BlackBerry Z10 will be available today in Britain, from February 5 in Canada and from March in the US. Pic/AFP