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It's just the amount and drying time of the glue that was used to bond the screen to the display glass. The reason the old iPhones didn't have this problem is because their screens were not bonded to the glass. I have a very slightly yellow display, but it doesn't bother me. It's not a display defect, it's just how much glue the machines are calibrated to deliver. I wouldn't be surprised to find that certain plants produce very yellow or blue screens.
 
Thanks guys, for reminding me to never compare my iPhone's screen to another one. I got my phone on launch day, so in theory it should have the "blue" screen. It looks great to me. And I'd hate to have my OCD flare up when I see it side by side with a better looking one. It took me weeks to give up and accept my MBP's ****** yellowish screen after 2 replacements.
 
i know there are a few people who have actually gotten defective screens that are completely yellow.

however, every picture i've seen in this thread is perfectly acceptable. earlier black iphone 4s seem to have had the "blue" screens while the white iphone 4s seem to have the "yellow" screens. i had a launch day black iphone 4 and recently switched to a white one. i never noticed the screen to be an yellower or the colors to be any different.

this is until i compared it to my friends launch day iphone 4, and realized my screen is a lot more yellow compared to his. if you put them side by side, then yes it does look more yellow.

but if you never knew about this "yellow" issue and didn't seek it out, i bet everyone would be very happy with their retina displays.

even knowing that i have the "yellow" screen today, the display still amazes me. any friends who use mine that have the "blue" screen don't automatically say "oh wow yours is more yellow"
 
Thank you for all your comments.
But. I don't think 'acceptable' is the right word here.
"Acceptable" is ok for cheap 30 bucks phone, where nobody cares about colors.
But not for the market leader, we both paid $700 each for unlocked phones.
And I want it perfect. Or at least as it was at launch time.

but if you never knew about this "yellow" issue and didn't seek it out, i bet everyone would be very happy with their retina displays.

We did not seek it for reason, we did not go to this forum thinking "maybe my device has some issue I should know about? ",
we found the problem both independently and just confirmed it when we met and compared all them.

I would say even my old original iphone - yes, it's old, the screen is too blue, it's not retina - but it has correct colors.
 
Long story short, they switched the phone and this one is better. The old screen was so yellow, the genius asked me if I smoked. Even after that comment, they still didn't feel like there was an issue.

They were a little rude -- the manager also. I don't really give a ****. If the yellow screen doesn't bother you, that's great. Go have a cookie. If it does, Apple should take care of it without acting like you are wasting their time.

If these freaking things didn't cost so much, everyone might be a little more forgiving.
 
It's just the amount and drying time of the glue that was used to bond the screen to the display glass. The reason the old iPhones didn't have this problem is because their screens were not bonded to the glass. I have a very slightly yellow display, but it doesn't bother me. It's not a display defect, it's just how much glue the machines are calibrated to deliver. I wouldn't be surprised to find that certain plants produce very yellow or blue screens.
This is completely UNTRUE. I wish Engadget had never run that story, not because their story was false, but because people misinterpreted it. The bonding agent caused yellow SPOTS, not yellow screens, that went away over time. That is a completely different story and has absolutely nothing to do with color temperature differences, which is what this topic is about.

As for the yellow screens: different phones have different screens, it happens with all phones, not just iPhones. Grab 10 random Nokia E72's (or whatever) and you'll find blue, yellow and screens that are in between. The iPhone is no exception. Stop worrying about it so much, and definitely not let Apple employees open up 40 boxes just because you like the blue color better...

People here are acting if they have the right to own a blue tinted iPhone. That's not true at all. I can understand some people like the blue screens better, but that does not mean the yellow screens are faulty or need replacement. These displays are perfectly fine as well, they're just different.
 
Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.0.2 Mobile/9A5259f Safari/6533.18.5)

Me and my wife both have vzw iPhones, hers is 16 and mine 32, I've been in my local apple store here in knoxville and looked at their display. Both of ours seem to match the display models pixel for pixel, this is my second one only due to a headphone jack issue that I later found out was my beats headphones and not the phone and my display is wonderful, I would like to actually see the yellow tint ppl speak of. Maybe the wife and I are just lucky. She does have the flaky home button. My safari has been having problems as of late, that would be bc of the beta tho. So far so good here. Sorry to hear you guys are having problems.
 
I had to get my iPhone replaced and I got the yellow tinted one. My brother has a launch iPhone 4 and he's got a blue tinted one.

Call me crazy, but I like the yellow tinted one better actually. The colors are represented more accurately than the blue one, which the colors looks a little more artificial to me.
 
Slings and Arrows of Outrageous Fortune...

I realize that this is an old thread, but sitting here with two iPhone 4s in front of me-- one markedly yellow, one a cool light blue, there is a decided difference.

As another poster wrote, we didn't discover this due to visiting this web site-- or even, in fact, by putting the phones next to each other-- or beside my iPod Touch 2G that I've been using for years (and has a cool-blue screen, with whiter whites).

No, what happened was that one of the first mornings I used my 2nd iPhone 4, I wondered why the screen looked weird The background, supposed to be white in the news app, seemed yellow. Text was harder to read, it made the screen protector more visible. I fiddled with brightness level, but it still didn't look good. At that point, I thought, "What's going on here?" and grabbed my iPod Touch for a comparison. Shock of shocks! Whites were white on it, or perhaps cool-blue, whereas they were definitely yellowish on the iP4.

At very high brightness levels, or with a white silicone wrap around, the yellowish one looked OK. At any level, its photos looked better than on my IPT, and any app involving black backgrounds (night themes on ebook readers and astronomy apps) looked much better than on my IPT.

But reading at low-light and brightness levels remains the pits. I'm glad I'm not alone; that it's not my imagination. Alas, this IP4, purchased used, is no longer under Apple Care, so I'm stuck.

Well, unless the reports of a jailbreak, color-calibrator app are true. If so, that's clearly a reason I'll jailbreak for the first time.
 
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