I loved my Symbian phones, but the iPhone was indeed a revolution. There's a reason Nokia and Blackberry are suffering losses.

The only ones I can relate to Nokia was internal wars between Symbian and Maemo units, and the fact that Symbian C++ tooling and C++ dialect were a pain to use.

Nothing to do with the device itself.

Virtually every new phone released today looks like the iPhone. That's your revolution right there. There are many technological advantages the iPhone brought. First and foremost the capacitative touchscreen. Nokia didn't go with the times and that was there end. Wether it was caused by internal wars or a stubborn leadership is irrelevant.