I took my iPhone X into an Apple store yesterday to get the screen replaced. It's the first iPhone I've owned that within a month had a very deep scratch across the lower third of the screen, along with several smaller scratches, that I think may have happened when my iPhone slid off the center console in my car and must have hit a rough piece of metal on its way down under my seat. None of my other iPhones ever had any kind of significant scratches going back to the original iPhone 10 years ago, so either my luck just ran out or the scratch protection isn't exactly all it's cracked up to be (pun intended). I tried living with the scratch, including with a glass screen protector applied, but I just kept seeing it and didn't like the added thickness the protector created. So I go in, having AppleCare+, and wait for two and half hours for them to do the replacement. After getting impatient and having several floor staff check multiple times where it's at in the process after 90 minutes, one of the techs finally came out with my phone in hand. He apologized for the delay - said they replaced the screen, but when doing the calibration, they couldn't get the ambient light sensor to perform to spec, and because that sensor is non-replaceable, they were giving me a new iPhone. He did ask if that was ok, as if I'd want to keep my existing X with a faulty sensor, which is likely due to the pressure they're getting from the right to fix people. I gladly accepted the replacement. The only cost for me was time in waiting and then updating the new phone from my backup, but I'm back to having a perfect screen and no out of pocket expense. It's one of those cases where I'm glad there was something else wrong, because I didn't have to pay for the replacement screen, nor use up one of my two screen replacements on AppleCare+.