Microsoft Corp. CEO Steve Ballmer And Nokia Oyj CEO Stephen Elop News Conference

Steve Ballmer, chief executive officer of Microsoft Corp., center, speaks while Stephen Elop, chief executive officer of Nokia Oyj, left, listens during a presentation of the new Nokia Lumia 920 smartphone at a news conference in Moscow, Russia, on Tuesday, Nov. 6, 2012. Microsoft is considering building mobile hardware as a backup, in the event that its current approach of providing software to handset makers such as Nokia Oyj and HTC Corp. falters, said the people, who requested anonymity because the plans are private. Photographer: Alexander Zemlianichenko Jr./Bloomberg via Getty Images