You can read the full story: https://en.wikipedia.org/wiki/Stephen_Elop#Early_leadership_...
Stephen Elop is now an infamous business book case. He was a Microsoft manager, than a trajan horse as Nokia CEO who burned their main platforms, shifted to WinPhone, de-valued Nokia, MS bought the Nokia devision, MS burned the devision ... read the article, btw Nokia was the biggest phone and smartphone (Symbian) manufacturer back then.