Check out OnePlus on Reddit. You'll see it all, the good & the bad. The people that love the device, the people who have urine colored screens, the ones that have yellow bands, the ones that have dead pixels, missing volume rockers, completely missing the phone entirely. You'll see it all.
The fact that these make it out of their warehouse and into customers hands is shocking. They say they have high standards, but can let a phone get mailed to a paying customer that is missing a volume rocker? Really. How the hell do you let that one slip. It's not like they're making mass amounts of devices every day.
And at the same time, if another big name manufacturer would have something like that happen, the customer service wouldn't be speaking to you like you're a child, or straight up saying photos showing discoloration have been doctored.
The whole yellow screen issue really makes me scratch my head. It's almost like they saw a few devices after they were fully assembled, noticed they were yellow, and then said they intentionally did it just to cover their own asses.
Who on Earth PURPOSELY makes a screen yellow? If you're going to let the user change the hues, make it white to begin with. Multiple devices using the same settings still don't even look close to each other.