Android / iOS / Lumia / other?

[Clysma]

İm a selling cellphones so trust me i have more experience on phones then you have

Well, I am selling flowers a lot, and still I dont know all of them, and where do the flowers grows the best.
You dont actually need to know much about, what you are selling, because in the end the customer chooses the right product for him. (Usually). Main point is to make money.

So, your argument is kind of invalid. :P