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Pictures | Thu Jan 31, 2013 | 1:52pm EST

BlackBerry shares slide as new devices face uphill battle

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

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...more

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
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Shevek, a prospective customer, scrolls through the menu of a new Blackberry Z10 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. The afterglow of Research In Motion Ltd 's BlackBerry 10 unveiling faded on Thursday as a flurry of lukewarm reviews signaled the company's struggle to regain momentum in the hyper-competitive smartphone market was just beginning. REUTERS/Andrew Winning

Shevek, a prospective customer, scrolls through the menu of a new Blackberry Z10 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. The afterglow of Research In Motion...more

Shevek, a prospective customer, scrolls through the menu of a new Blackberry Z10 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. The afterglow of Research In Motion Ltd 's BlackBerry 10 unveiling faded on Thursday as a flurry of lukewarm reviews signaled the company's struggle to regain momentum in the hyper-competitive smartphone market was just beginning. REUTERS/Andrew Winning
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Ben Stephens, a Blackberry sales manager demonstrates a new Blackberry Z10 to prospective customer Shevek 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. The afterglow of Research In Motion Ltd 's BlackBerry 10 unveiling faded on Thursday as a flurry of lukewarm reviews signaled the company's struggle to regain momentum in the hyper-competitive smartphone market was just beginning. REUTERS/Andrew Winning

Ben Stephens, a Blackberry sales manager demonstrates a new Blackberry Z10 to prospective customer Shevek 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. The afterglow...more

Ben Stephens, a Blackberry sales manager demonstrates a new Blackberry Z10 to prospective customer Shevek 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. The afterglow of Research In Motion Ltd 's BlackBerry 10 unveiling faded on Thursday as a flurry of lukewarm reviews signaled the company's struggle to regain momentum in the hyper-competitive smartphone market was just beginning. REUTERS/Andrew Winning
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A shopper looks at a new Blackberry Z10 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

A shopper looks at a new Blackberry Z10 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...more

A shopper looks at a new Blackberry Z10 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
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A new Blackberry Z10 is displayed 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

A new Blackberry Z10 is displayed 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...more

A new Blackberry Z10 is displayed 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
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A shopper looks at a new Blackberry Z10 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

A shopper looks at a new Blackberry Z10 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...more

A shopper looks at a new Blackberry Z10 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
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