I returned mine I found that the focus issue is just because of the actual camera and can't be fixed.
I guess they had to cut costs. I returned mine to Amazon and bought the honor 6x and the dual cameras are absolutely outstanding. Better than my iPhone 7 plus. The honor 6x is $189USD and is also getting android Oreo. I'm sorry I really wanted to like the Nokia 6 but the camera just can't keep up with the moto G5 or the honor 6x