forgetting that MS pays Nokia a billion a year and that they have special licence agreement (ie, less than 24$, could even be nothing at all at the beginning for what we know) is not being "conservative"
1. Nokia has better contract with ms than zte
2. You forgot the scenario that nokias smartphone platform dies (symbian/wp) and they want to stay alive as pure service company. Symbian = certain default
3. Nokias priorities are their services on top of wp (in west), wheres the problem?
I beg everyone to research themselves instead of believing everything symbian fanboy say. And naturally everyone should take my writings with a grain of salt or find the sources themselves.