By Ritsuko Ando HELSINKI (Reuters) - Weak quarterly sales of Nokia smartphones raised the heat on CEO Stephen Elop, whose decision to adopt Microsoft's untested Windows Phone software has yet to deliver the recovery in the company's fortunes he was hired to achieve. Nokia has pinned its hopes on its Lumia smartphones to close the yawning lead of the market frontrunners Samsung and Apple, but progress has disappointed many investors and analysts. Nokia shares fell as much as 6 percent on Thursday after the company said it shipped 7. ...



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