On the opposite. Things "like the Nokia X" has nothing to do with Nokia's downfall in the handset space. That has to do with poor management and other administrator decisions.
Nokia X was a briliant move by Nokia to force MS to buy the handset division. Most likely they had a full Android device in the works also (I would have, ready to announce as soon as the exclusitivity ends!). This should be clear to everyone now as more and more sales numbers are poping up. WP is not doing good and Nokia to get the price what they did is amazing. Seriously, the handset division was and is a piece of **** business. Most likely MS would have had easier job on starting with one Surface phone and build it from there vs. making the bought division profidable. Nokia just had palyed their cards so well (well, of course after they ****ed up big time to get themself in the mess they were), that MS had no other choise then buy. Nokia was able to dictate good conditions, no make it VERY good condtions. This of course was due to Nokia dominance in the WP space, if Nokia would have gone Android after the exclusivity ended, it would have been bye bye WP.
I have a feeling that you will read about this play by Nokia later in the business education books. First chapter is about one of the biggest fall's in the history; by mr. Ollila and mr. Kallasmaa and how they ruined the whole company and the second about how mr. Siilasmaa and the rest of the board played so they forced Microsoft to buy pile of ****. Damn they got good conditions..... Seriously, they kept everything thats worth any money.. LOL the name, the patents, NSN, everything... Whoaaaaaa.
What would be nice to know are full facts and numbers. Could Nokia have gone the Android route in the beginning rather than WP? There are so many things to consider in this scenario, like Here for example (google would have done everything probably to destroy the only real competiton to google maps). Also the amounts MS paid to support Nokia with WP were most likely crucial on supporting Nokia between the transition.
Lol, I wonder how early they knew about the total destruction of Symbian, Im sure it was wayyyy sooner than many think. They knew they were in some deepest fking **** ever.