I dont disagree that there will be defective units just like with every mass produced product out there.
I dont have any issues with mine and if I did I have a full year to let Apple take care of any issue like they always did in the past.
There are people that cannot be satisfied no matter what. They will return it a dozen times and look for the perfect iPhone.
If the Apple reps lets them they will go over 20-30 devices and find flaws in all of them. That's insanity.
Its just a phone, use it and dont look for tiny specs of dust, or any other crazy minor imperfection, yellow or white screen, different baseband chips or whatever other nonsense people stress and obsess about and wasting time, energy and keep returning back to Apple for replacements.
What is your point of joining this forum Monday and all you did was take part in complaining, arguing with members and posting negativity?
You have 14 days to return your device if you're not happy and a full 1 year warranty.
Its pretty simple, life is easy with some common sense you will live in peace

Focus on whats important in life and dont stress yourself over the little things.