Ben Stephens, a Blackberry sales manager demonstrates a new Blackberry Z10 to prospective customer Shevek at a branch of phones 4U in central London

 
Ben Stephens, a Blackberry sales manager demonstrates a new Blackberry Z10 to prospective customer Shevek at a branch of phones 4U in central London
Ben Stephens (R), a Blackberry sales manager demonstrates a new Blackberry Z10 to prospective customer Shevek (C), as store manager Alejandra Escobar watches at a branch of UK retailer Phones 4U in central London, January 31, 2013. Blackberry's new Z10 model went on sale in the UK today. Research In Motion Ltd's glitzy unveiling of the long-delayed line of BlackBerry smartphones on Wednesday and a new corporate name failed to impress Wall Street analysts, with at least three downgrading the company's stock. REUTERS/Andrew Winning