Persistent washed-out color issue on iPhone 13 Pro Max after iOS 18.7 update

The first screen replacement was due to the common iPhone 13 Pro Max white screen failure, which appeared unexpectedly and out of warranty.

The repair center did not allow me to keep the defective display because it had to be returned to Apple for analysis and disposal.

The second replacement was unplanned. During a battery replacement, I mentioned the same color-related issues to the iShop technician. He inspected the device and discovered that the display connector had not been seated properly. He reconnected it as a courtesy. New display

However, even after that, the issue with the display’s color calibration persisted. The technician showed me that his own iPhone 15 Pro running iOS 18 exhibited the same desaturated color behavior, suggesting it could be a software-level calibration or gamma issue rather than a hardware defect.

I have an update regarding your previous advice.

I contacted Apple Support, and they ran a remote diagnostic. Their recommendation was to visit the iShop store, where the screen replacement was originally done. The

technicians there performed a full diagnostic and concluded that everything was "normal."

However, I shared visual evidence comparing my iPhone 13 Pro Max to other units (including iPhone 13 Pro and 13 Pro Max models owned by colleagues), and the difference in color reproduction was clearly visible — their displays looked more vivid and balanced, while mine remained washed out.

The iShop team confirmed that the screen and hardware are fine, and since this is already my second screen replacement, they couldn't identify what else could be wrong. They even reset my device and reinstalled ios 26.0.1, but the issue persists exactly the same.

At this point, I honestly don't know what else to do. The display looks lifeless and lacks contrast, and no one seems to have a definitive answer. I really need help or a higher-level review from Apple to determine whether this is a software-level gamma or color calibration issue.

This is what it shows. Thank you very much for your time and for being attentive to my questions.

I’m really desperate about how my iPhone display looks — the colors appear washed out and lifeless, and nothing (True Tone, Night Shift, accessibility filters, etc.) seems to fix it.

I’d really appreciate any guidance or next steps you recommend.

I truly appreciate your help and the time you took to explain everything in detail. Your message was very helpful and gave me a clearer direction to follow. Thank you again for your kindness and support. I'm now in the hands of Apple Support to resolve my problem, which has been affecting me for so long. Have a good day and an excellent month and start to the month.