When ex-Microsoft executive Stephen Elop took the reins of Nokia back in 2011, he memorably compared the Finnish phone-maker to a burning old platform in the North Sea. 'I have learned that we are standing on a burning platform,' he wrote in a widely circulated memo. 'And, we have more than one explosion — we have multiple points of scorching heat that are fueling a blazing fire around us.' Elop suggested competitors such as Apple and Google had 'poured flames on our market share,' with the damage accelerated by Nokia's failure to embrace big trends. His solution: abandon Nokia's homegrown operating systems, including Symbian, in favor of Microsoft's Windows Phone. Nokia's Windows Phones managed to attract some significant buzz at this year's Consumer Electronics Show, and early sales seemed solid. But now there are signs the situation could be deteriorating."