No, it's white. Just a more yellowish white than what you're accustomed to. But what you're accustomed to is significantly bluer than the international standard. The problem isn't the iPhone.

iPhones are consistently rated as the most color accurate phones in the industry by pretty much every independent reviewer that can measure color accuracy. They're not piss yellow, they're accurate. You're just used to blueish whites.

The measurements are not inaccurate. The calibration works.

Here's the deal: there is no such thing as a "perfectly white" white. It does not exist in and of itself. Perfectly white is whatever combination of red, green and blue we choose to define as "white". And that is the D65 white point. It's an international standard used by virtually all content creators. That means when an artist wants something to look "white", they make it look like the d65 white point. If they want a bluish white they'll skew blue and if they want a yellowish white they'll skew red.

Modern iPhone screens are the most color accurate in the phone industry, and by "most accurate" I mean that the default "white" they display (ie RGB 255,255,255) is the closest to the D65 white point.

However MANY phones and perhaps more significantly TVs skew wayyyy bluer than the D65 white point. That means every piece of content you watch is displayed to you much bluer than the artist intended. This results in the average person tending to consider an overly blue white as the "normal white".

If you have a NON DEFECTIVE iPhone, and you think it looks piss yellow, then you are subconsciously used to an overly blue white point. What you consider as "perfectly white" is NOT what the entire content industry considers to be "white". The problem comes from you.

It's either that, or OP's display is defective. It really is that simple.

It's not what Apple claims. It's what independent reviewers have thoroughly measured. And it's not Apple's standard, it's the entire content creation industry's standard.

If you show the same image on a recent iPhone with truetone off and on another phone and the iPhone looks "piss yellow", it's not because the iPhone screen is bad. It's because the "actual good display" is too blue. Therefore it's not an "actual good display". It's just one that fits your skewed preferences.

In all cases, the off-axis color shifting is way smaller than what you get on an LCD

People who get migraines from OLED do not get migraines from the OLED technology in and of itself but from the use of PWM to control brightness. This can happen on LCDs and microLEDs as well.

I have an iPhone 14 pro in my hand right now with truetone off and it's not piss yellow. iPhone displays are consistently tested to be the most color accurate in the phone industry. If you think a non defective modern iPhone with truetone disabled looks "piss yellow", the problem is 100% coming from you. You are accustomed to overly blue-tinted consumer displays to the point of considering that the international standard for white looks yellow

Strong doubts on what the guy told you at the Genius bar, I suspect you just have a defective display. Might be worth making another appointment as it's unlikely you can accurately correct a miscalibrated display with just a hue filter.

Or you're just used to the overly blue tint many consumer displays are calibrated to show. The DCI standard for "white" is a lot more "yellow" than people would think.

MicroLED will likely never happen on phones. The reason every MicroLED display is 100+ inches is that they can't stack the LEDs any closer. We'd need two to three orders of magnitude of progress in how close they can be stacked which is unlikely to happen considering the pace at which the tech is currently evolving

At the end of the day the slight off axis tinting you get on OLEDs is a very very very small price to pay for the massive benefits the tech brings in terms of picture quality

Also Micro LED displays cannot bend like OLED. The reason they could make a foldable screen is that MicroLED is produced in small portions of screen because yields aren't high enough for full display-size boards. So they have to assemble the smaller boards together to make a complete screen. This is a problem because the seams can often be visible on the finished display. Basically the folding MicroLED TV that was shown is just several displays moving together and aligning themselves.