Guys I have been watching this discussion since yesterday (when I got my phone)
Same issue here, strong yellow tint, utterly distracting
Got some information/solution to share and may be helpful
1. Screen comparison tells me iphone X screens indeed are the warmest
I am based in Amsterdam, I went to a Mediamarkt and Apple Store Amsterdam, compared 10+ iphone X, Macbooks, Galaxy 8, Microsoft surface, TV screens.. Only iphone X screens are yellow, the rest are either pink or bluish.
Interestingly, all the display models have similar level of yellowness... this doesnt vary, have not seen any white one
2. iphone X screens do varies: mine is brighter but slightly yellower than all the show case model i compared
3. Color filter + night shift combination (may not work for everyone, but worth sharing)
I found the color filter too grey and washed out some color, but we cant reduce the intensity further, so I bring in nightshift.
Step 1: nightshift truetone off -> color filter -> color tint -> lowest intensity
Step 2: slide the hue bar to a point that if you slide left it gets green, to the right it gets red, that is the spot I like
Step 3: All above are standard, if you feel the color is too grey or blue, go to nightshift setting, turn it on and with lowest warm. See how you like it. If you want to keep it then schedule something like 4:00 to 3:59, it will then be almost 24 hours on. After this step, my X screen is close to my iphone 6 color temp
Edit: now I am with color filter + True Tone, the True Tone looks very comfortable (it displays crisp white outdoor and hardly noticeable warmness under warm light) with night shift off
I booked a genius bar appointment to chat with them regarding my brighter but yellower screen, will post the result on Saturday.
Cheers