Not mind boggling at all. Nokia was a beast. That 3310 was from 17 years ago. The year before that they sold 150 million of the 3210. They sold 250 million of the 1100 in 2003 and another 250 million of the 1100 bar style in 2005. What's mind boggling is Nokia's descent from market leader to an afterthought in such a short time. Android murdered that company.
It is undenieable to agree Android overtook Nokia but in this case it is unlikely that Apple would murder Samsung. They are subsitute each other for many people. Apple overtakes in Q4 but Samsung's share is still bigger...