iOS 18.3 update causing unexpected shutdown on my iPhone

I updated my phone last night to 18.3. This morning, after getting the phone setup and doing chores, the phone just shut off on its own. I could not get it to turn back on without connecting the charger, yet the battery was 83% charged. Is this a software glitch in the update?



[Re-Titled by Moderator]

iPhone 14 Pro, iOS 18

Posted on Jan 28, 2025 5:06 AM

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Posted on Feb 7, 2025 7:13 PM

Hi!bigness1970! I experienced the same issue after updating to iOS 18.3. I upgraded my iPhone 16 yesterday, and the update process was surprisingly fast—only took about 7 minutes. But in the past few hours, my phone also has been shutting down for no reason ..... At first I thought it was a hardware issue,tried to restarts it, no luck and it even gets stuck in a boot loop. I suspect that the rapid installation process may have caused system instability. but now since I fixed it,it's likely a software problem😁.


You can try some of the solutions I found:


1. **Force restart your iPhone** – Press and quickly release the Volume Up button, then the Volume Down button. Hold the Power button until the Apple logo appears.

2. **Reinstall iOS using a computer** – This worked for me, you can see this artical. I used my computer to fix this restart issue , and my iPhone stopped shutting down. You can try the same method.


Also, check out the offcial links here:

If your iPhone is stuck on the Apple logo - Apple Support

Restart your iPhone - Apple Support

If your iPhone won't turn on or is frozen - Apple Support


You can also contact the support team to fix this!(https://support.apple.com)

Hope this helps! 😊




89 replies

Jan 28, 2025 5:45 AM in response to SravanKrA

Nothing has changed on my part. The phone is not jailbroken, and very few apps, all from the App Store. It is an iPhone 14, and none of the settings had been changed from 18.2 on my part. I am asking because I don’t know if it was just a freak occurrence, or if it is directly related to the update, as it has never happened before this morning. I’ll see if it happens again, and update if it does. I was just asking to see if anyone else had the issue since yesterday, when 18.3 came out.

Jan 30, 2025 9:35 AM in response to bigness1970

I tried to update to 18.3 on Jan. 28. - iPhone SE, Generation 2. I have two of these phones, for different numbers. They were at 17.2.1 (I think), and both were working fine with my PC and iTunes.

BOTH PHONES LOCKED UP DURING THE UPDATE. They are stuck in the process - with the Apple Logo and a progress bar, about 5% complete (or so).

There was no plugging them back in, the PC nor iTunes recognized them at all. No attempts to reboot or restart the phones had any effect at all. I tried rebooting the PC, restarting iTunes, phones plugged in and unplugged. Nothing works. Help!!!

Feb 3, 2025 12:55 PM in response to bigness1970

This maybe an issue with iTunes on Windows. For me, iTunes is crashing in the middle of the update. After that the iPhone doesn't get past that 5% progress and sites on the Apple logo.


Faulting application name: iTunes.exe, version: 12.13.4.4, time stamp: 0x670a9843

Faulting module name: objc.dll, version: 1.528.1.494, time stamp: 0x66aa88f3

Exception code: 0xc0000005

Fault offset: 0x0000000000025292

Faulting process id: 0x9DA8

Faulting application start time: 0x1DB767B747DF8E4

Faulting application path: C:\Program Files\WindowsApps\AppleInc.iTunes_12134.4.3008.0_x64__nzyj5cx40ttqa\iTunes.exe

Faulting module path: C:\Program Files\WindowsApps\AppleInc.iTunes_12134.4.3008.0_x64__nzyj5cx40ttqa\objc.dll

Report Id: 0447474c-0804-4b05-a3ef-65b6acaea301

Faulting package full name: AppleInc.iTunes_12134.4.3008.0_x64__nzyj5cx40ttqa

Faulting package-relative application ID: iTunes


I could provide the dump files from the crash if anyone at Apple is interested.


I don't have another computer to try so off to store it is I suppose.


Ps: update or restore do the same thing.

Feb 4, 2025 8:52 AM in response to bigness1970

I have an iphone 15 pro max 1TB. I always update to the latest ios when a new one comes out, so I was running ios 18.2 when this happened. I started downloading the file on my iphone, however I'm currently traveling with unreliable wifi access so I didn't notice when last night the phone must have gone into update mode because I awoke this morning to the white apple logo on my screen. It has been showing that logo, then the phone turns off, rinse and repeat. I've tried the hard restart method with no luck. I've tried connecting my phone to my macbook but it won't download the update. My phone hadn't finished syncing photos or the backup to the cloud so I'm unwilling to restore immediately. Apple needs to come out with a real SOLUTION to this problem. This should not be happening with an almost brand new phone with the current ios.

Feb 5, 2025 3:08 PM in response to Dan_Renee

I encountered a very frustrating situation with the 18.3 update on my 14 Pro Max. I was going backup my phone via iTunes and iTunes wanted to update my iOS first. That was a disaster. It basically failed during the update iTunes indicating it could complete the update and essentially bricked the phone (frozen mid progress bar). I utilized the forced restart several times and iTunes attempted the updates again, but to no avail (same error and frozen update progress bar. I was finally forced to go through the painful factory restore process, and unfortunately, lose a significant amount of data as I had backed up recently, which is not the fault of the update. So, a word of advice, back up regularly because an iOS update my not as planned.

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iOS 18.3 update causing unexpected shutdown on my iPhone

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