Some say that the production process of iphones change during the months following the release date, effectively "ironing out" any initial kinks. Do you think there is any truth to this? The reason I'm asking is because I got the Xs and decided to return it within my 14-day-window because of the severe OLED banding my specific unit had combined with reception issues I noticed compared to my iphone 8. Considering rebuying the Xs if things improve.