When we want to talk about "the best" we must talk about about what is the points that we Stand on it & what is the definition of "the best" in our mind .

Maybe someone thinks that the best smartphone is the phone with the best camera , someone else thinks that the best phone is which have a good OS .

So , is the best phone the perfect one ? of course not cause there isn't a perfect phone . the best phone is the nearest phone to the perfect .