Linux was not a mistake on these devices. And I say that as the foremost hater of open source and Linux you can find around here. In fact, the N9 Linux phone was a huge success among everyday people in several countries. Farmers, teenagers, everybody got an N9. You couldn't go to any small party without at least two people having the N9 phone. Everybody loved them. It was in no way a hacker device for nerds.

What killed these Linux phones was Microsoft doing a hostile takeover of Nokia. The owners of Nokia felt they couldn't compete with Apple's iPhone and decided to scuttle their business and transfer out as much money as possible to their own offshore accounts in the Pacific before the company going belly up. I think they could have competed if they weren't such cowards.