How do you find the OS version?

[Landsharkk]

I know that the OS version 10586 is suppose to ship with the phone, but under Settings -> Extras -> Advanced Info on my Wife's 950 there is no 10586 listed anywhere.

Is the OS version listed somewhere else?

 

[enahs555]

Settings/System/About/MoreInfo (button).
Then the OS Build is what number you referenced.