I did something similar to what Yolande mentioned ^.
Been feeling like my 12pro display isn’t as bright/vibrant compared to my iPhone X but can’t quite pinpoint the problem until I first heard about the yellow tint from everythingapplepro’s YouTube review.
So I headed down to the apple store physically to compare my 12pro with their display models and although the displays were also “warmer”, the one I possessed was definitely “jaundiced”. Asked the Apple staff about it and he concurs with my observation, so he advised me to give the returns/replacement people a call as it’ll be the best course of action since they don’t have 12pro in stock in most Apple store to replace immediately at once.
so fast forward to the (returns) call.. everything was super chill and easy - it was probably the easiest customer service call in my life (makes me wonder if apple is actually already aware of this problem). The returns ppl gave me the option of replacement by pushing my order into the next available shipment. As a result, I get to continue using this ‘jaundiced’ phone until the stock replenishment at the Apple store where I can just head in to replace this current 12pro.
Would probably also advise anyone else annoyed by their screen to do the same as it’s quite hassle free and you can just keep working the phone you own!