Apple logo flash at startup

New iPhone 12 Pro. At startup the Apple logo flashes super bright for a brief second then the screen goes dark for about 10 seconds before the Apple Logo re appears at normal brightness to finish the startup. I’ve had iPhones for years and never had the logo turn on and then off during startup. Is that Normal for the 12?

iPhone 12 Pro, iOS 14

Posted on Jan 14, 2021 6:41 PM

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Question marked as Top-ranking reply

Posted on Jan 30, 2021 5:37 AM

After more than two weeks, I think that it is time to sum up the situation: the "flashing Apple logo" issue described by Blue-per does not occur when we unbox and boot the iPhone 12 (mini)/12 Pro (Max) for the first time, it occurs when the iPhone is already set up.

In most cases the phone performs normally after it boots up. Some users found hardware problems when using their new iPhone (phone needing to be connected to power in order to boot up, screen burn-in, battery charges very slowly, camera not taking HDR photos, etc.).

In my opinion those problems are not related with the flashing logo at startup, because they are very different from each other and they are isolated cases. They are just coincidences.

That does not mean that the flashing logo is not an issue: there are iPhone 12/12 Pro which boots with the (classic) steady Apple logo and some iPhone 12/12 Pro that do not, so it is obviously not a normal thing. It is not a "new feature" or "expected behavior".


After reading other answers on the forum, we can deduce that the issue does not occur on iPhone 12/12 Pro that were shipped with iOS 14.1 or with iOS 14.2 pre-installed, it (mainly) occurs on iPhone 12/12 Pro shipped in January with iOS 14.3 pre-installed. As a matter of fact a lot of people returned the device during the last weeks and got a new one with the same problem.

Now, we suppose (and hope) that the issue is part of iOS 14.3 and not in the hardware of the phone. In this case Apple should be able to fix it with an update, maybe already with a sub-dot-release (iOS 14.4.X) or later with iOS 14.5. There are some comments in favor of that supposition too, where people noticed that issue after updating from iOS 14.2 to iOS 14.3.


On the other hand, it is strange that (most) iPhones who updated the operating system from 14.2 to 14.3 did not experience the issue. And it is even stranger that I read a reply from a user who encountered the problem already on iOS 14.2. Those facts contradict our supposition above, and maybe the flashing logo has nothing to do with iOS 14.3.


I am sure a lot of people have this problem too; they do not notice it, because nowadays we do not shutdown and restart our phones very often. And even if they do that, they (probably) don't keep looking at the boot screen for issues.

It is very hard for us to guess if it is a software or a hardware problem. Only Apple can give us an official answer, and in order to solve the problem as soon as possible I ask you to continue upvoting this and other similar posts (clicking on "I have this question too"), commenting if you have some news from Apple and reporting the case to the Apple Support.

1,089 replies

Mar 14, 2021 5:24 AM in response to Blue-per

I am writing from China.

I have the same issue on my very new iPhone 12 Pro with iOS 14.4.

Yesterday I went to (official) apple store and showed them the flash bootup screen. In reply their genius said "about 70% percent of iPhone 12 shipped with this issue and they cannot guarantee that the replaced device would be free of that issue."

They have also added that "they think it's a software problem which apple will fix soon"


But me personally feel like it's a hardware issue, cause other models of iPhone running iOS 14.4 without any issue.

If it's happened to be that (hardware) problem, what's the solution for us (general users)?????


Mar 21, 2021 8:04 AM in response to ACSurfer14

ACAppleCare wrote:

I had this same exact issue with my brand new iPhone 12 PRO. I even posted about it in a separate thread and have now "upvoted" this question here. I have since returned the phone and have not purchased another one.

Do we know if this has been addressed by Apple anywhere or if the latest crop of iPhone 12 Pros no longer have this issue? I am waiting to buy one but won't be doing so until Apple addresses this issue or at least acknowledges what the problem is.

Thank you

It is not an issue. It is a minor cosmetic bug. The Apple logo should stay on until the phone starts, about 15-20 seconds. Instead it appears, is blanked out, then appears again.


To start your phone hold the SIDE button until the Apple logo appears, then release it. Wait for the Lock screen to appear. Don’t touch any buttons again until it appears.

Mar 21, 2021 1:43 PM in response to MzKeek

MzKeek wrote:

I agree that if you’re spending $1200 on a telephone, it should work without a “glitch.“.

That is a very naive view. In any software that’s more than a few lines of code there will be bugs. A system the size of iOS (millions of lines of code) at any given time has thousands of bugs, even in the released version. Some of these bugs have been identified and cataloged, and some of them are currently unknown and may or may not become evident at some point in the future. The known bugs are sorted by severity, and the ones most likely to impact use of the product get the highest priority. But any complex software is released with known bugs that have not been fixed because they do not impact normal operation of the product. This is one of them, because it does not affect operation of the phone in any way; it is purely cosmetic. Critical, newly discovered bugs that are related to security are fixed quickly; iOS 14.4.1 was released specifically for this reason. Less critical bugs wait for the next scheduled update, which is beta tested for weeks or months before being released to everyone.


Anyone following the thread has seen email notifications of posts from other users that report that it will be fixed soon. Those posts have been removed from the thread by the moderators, because they revealed details that those users were not authorized to published due to their non-disclosure agreement with Apple.


A detail worth mentioning is that any time you fix a bug there is a probability that you will introduce a new bug in the process. In a well managed development process this probability is low, but it still exists. Thus, frequently an unobtrusive bug or one that occurs very rarely is not fixed, just because of this risk.

Apr 28, 2021 5:16 AM in response to Blue-per

Hi Everyone,


I have the same issue, I don't remember I had it when I initially switched on the phone...

I called the support, we tried to reinstall the OS, reset the phone and reinstall the phone, didn't help, so they advised me to send it to the service. I sent it to the service , now they are saying the phone has no hardware issue, apple knows about it and be patient and keep the phone updated, till they sort this out....


Okay, we talk about a premium device, that's just one point, the other one, why the support didn't mention they know about it, why the **** I had to reset my phone and send it to the service ?



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Apple logo flash at startup

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