iOS 18.3 update causing unexpected shutdown on my iPhone

BRICKED.

After installing iOS 18.3.2 earlier this afternoon, my SE2 never restarted. I called Apple support and waited nearly ten minutes before speaking with someone, which tells me they’re getting a lot of complaints.

tried with power attached and not, numerous up volume/down volume/power down for forty seconds, but no joy.

rep told me to bring it in

BetaBites wrote: "Moderators refusing to acknowledge issues (...) your update has crippled my phone?..."

BetaBites ~ These user-to-user communities don't exist for Apple "to acknowledge issues."

What model of iPhone do you have?...

Settings > General > About > Model Name

And what version of iOS is it running?...

Settings > General > About > iOS Version

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jocelyne266 wrote: "...i updated my new ios 18.3.1 and my phone is shutting off its self frequently"

jocelyne ~ What model of iPhone is it?...

Settings > General > About > Model Name

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After I tried everything I knew, my computer store worked on my phones for 2 days TO NO AVAIL. At the suggestion of Apple Support, I took the 2 TOTALLY UNRESPONSIVE iPhone SEs to the Geek Squad at BEST BUY! Evidently, they must have some good Apple hardware/software - they had my phones updated and working within a half hour!!! GREAT NEWS! And the cost was $00!!!

Updated to 18.3, my iphone 14 pro max started with shutting down at %4

Got worse since the last 48 hours my phone now turns off at %22 and when I turn it back on it will be at %10, immidietly I plugin a charger it flies straight to %40

Its completly misbehaving

I had the problem with the (genuine Apple) charger not being recognised after the update so reset the phone & it started charging as normal.

However, the phone did not recognise the charger again today :(

Since I'm waiting in for a delivery, I had time to have a fiddle - after which it now seems to be working - today at least!

In Settings, Battery Health & Charging, I turned off both Optimised & Clean Energy charging whilst plugged in to the unrecognised charger & it has started to charge :)

After removing the charger & plugging in again it has worked once more so maybe that narrows it down a bit?

It's saved another reset anyway!

I updated my iPhone 16 promax to 18.3 last night and this afternoon the exact same thing happened. Definitely the IOS

I had to take my 2 phones to Best Buy Geek Squad (locally in Springfield, IL) - one of them TWICE - to recover and even work at all after update 18.3 and 18.3.1.

Very leery of these updates!!!

TL;DR Unsuccessful initial update attempt, had to restore phone to factory settings, then

recover from backup. Very painful, time consuming, and worrying. Good luck to you.

We've had the same issue on two different phones, a 13 Pro and a 12 Pro. We were updating via iTunes on Windows. In each case the update takes the phone into update mode, the progress bar just starts to move, then the iTunes app exits and the device is stuck on the Apple logo with just a tiny bit of progress on the progress bar.

1. We reset the device (quick up vol, quick down vol, hold on power button until your finger goes numb and finally you get the Apple logo) to get to recovery mode. Tried to update again. No luck.
2. Tried with a different cable. Tried with a different USB port. Nothing worked. Always got stuck in the same place. Tried restore vs update. Nothing. Always stopped very early in the process.
3. Tried a different computer. Didn't work initially.
4. Rebooted second computer and again, restored rather than updated because at this point we just wanted the phone back to working state. That finally worked. The restore worked.
5. We moved the phone back to the original computer with the backup and recovered the settings. Had to reauthorize the phone, prove we were the owners, then iTunes let us select the backup to recover from. Success. Had to redo some settings such as Face ID, but the phone was now at 18.3 and functional.

We had started to look at making an appointment at a Apple Store. But yeah - they use the phone as second factor when you try to sign in so that's not helpful when the phone is broken. So I guess you would have to call.

Luckily it didn't come to that for us.

I suspect the issue is a corrupted firmware image that only some people are "lucky" enough to get when trying to update. The successful recovery was done on a second computer that downloaded the firmware again. Could the first firmware image be corrupted? Maybe. Maybe there is a corrupted image out the in the Content Distribution Network and just a subset of us are getting unlucky enough to pull it initially?

Not only does it seem shutdown, my phone is lagging (sending a text), freezing up in settings and especially not working when I try to change settings in family restrictions for my kids linked phones! It’s very frustrating that just because I updated with 18.3 version on my 14 plus iPhone that I’m experiencing this most basic functions of my phone!

I visited the Apple store, and they performed the same troubleshooting steps on my Mac that I had already tried at home. They attempted to restore the device, but it didn't work for them either. The staff informed me that I would need to replace almost all the internal components, except for the camera and a few other parts, which would cost $600. Their honest advice was to upgrade to the latest iPhone instead. I suspect this issue is a deliberate ploy to encourage people to upgrade, as it seems to be affecting newer devices as well. It’s unfortunate that while my devices are still under warranty, they will be replaced for free. However, those with older models are essentially being nudged to pay for an upgrade to the latest version. It’s quite sad.

My Iphone 13 is also experiencing so many issues after installing IOS18.3! after i reset my phone when the update was installed, it turned off my facetime, imessage, deleted my payment method and on top of all that it keeps freezing and shutting down by its self.

Thx. I’m not denying the older battery could be the issue here with the dead phone, but the possibility that the older battery caused bad mic input in Messages doesn’t explain why the mic input was perfect in Apple Audio Memo. I’ll schedule either a tech bar visit or a battery replacement either way.