***PLEASE LIKE/HEART THIS POST IF YOU HAVE ANY OF THE GALAXY S24 WITH THE GRAINY DISPLAY AND/OR COLOR BANDING. THE INTENT OF THIS POST IS TO BRING AWARENESS TO SAMSUNG ABOUT THIS ISSUE***
I believe the Samsung community demands a response for the grainy display issue and color banding issue, and Samsung customer service must not try to brush off the issue by saying this was intentional for "eye comfort," as they have tried to give me and a previous poster on the Samsung Member app the same response.
SAMSUNG, PLEASE HELP YOUR CUSTOMERS RESOLVE THEIR PROBLEM BY EITHER EXTENDING THEIR RETURN WINDOW OR PROVIDING THEM WITH NON-DEFECTIVE S24 REPLACEMENTS AT NO ADDITIONAL COST OR LOSS IN PROMOTIONAL DEALS FOR PEOPLE THAT PRE-ORDERED.
There are many reports on here that have not received the proper attention. The issue is very much real and many people are reporting this issue on multiple websites. DxOMark, a professional electronic reviewing company, has done testing for uniform luminosity on the S24 Ultra display and has shown that it is not as uniform as the S23 Ultra's display. This issue is known as "mura," which can be caused by variations in the manufacturing process or material degradation over time, affecting the display's ability to produce consistent colors and brightness levels across its surface.
I will attach multiple links to videos and websites that discuss this issue affecting many Samsung S24 user's displays. Some people went into depth to look at the screen at a microscopic level and others show this issue at a macro level. I will also attach my photos of the S24 Ultra next to the S23 Ultra at low brightness.
If you have photos or video recordings of your phone having this issue, I invite you to please include them as attachments or links so we have concrete evidence from the community to present to Samsung. You can usually see this issue manifest when your phone is in dark mode and the phone is on low brightness, especially with grey and green backgrounds. Extra dim also makes the grain even more apparent.
In an effort to help Samsung analyze the root of this problem, it may be useful to provide the manufacturing date (found on S24 box) of your device and where it was produced ("Device Info" app can help with this). In my case, my device was manufactured in Vietnam on 1/8/24. Hopefully we see a pattern for affected devices.
Links:
Poll of users affected by the grainy display issue on reddit:
S24 Ultra display analyzed and compared to S23 Ultra and iPhone under a 400x optical microscope:
DxOMark uniformity test of S24 display:
DxOMark uniformity test of S23 display:
Video of S24 Ultra display compared to S23 Ultra and iPhone displays:
Edit 1: Adding link for a potential relationship with the grain display issue. Video claims to have looked at the S24U under a microscopic and saw that in pure red, green, and blue colors, other colors are being activated (white light leak through). So this could be a graphics driver related issue. While this is related more to the washed out colors of the screen, it could relate the grain.
Personal Phone Issue:
My S24 Ultra grainy display and color banding:
The same 3 color banding spots and mura are consistent in the YouTube video from a reviewer, DxOMark's luminance uniformity test for the S24 Ultra, and my phone.
Personal Device - S24 Ultra Low Brightness, Grey Screen
Personal Device - S24 Ultra Low Brightness, Green Screen
Here is mura on my S24U unit - it's pretty obvious and unacceptable
