Level 1

13 points

Phone keeps shutting off and restarts on its own after the iOS 26 update

I updated my phone from iOS 18.5 to iOS 26 (not beta) and it worked well for few hours until it showed me heating warning - although the phone was not warm to touch, I have had the phone more heated on charing it wirelessly but it worked fine still. After that, the phone just keeps on shutting down and restarting on its own. Now, I cannot use my phone because it gives up on me unannounced.

Does anyone have any suggestions? P.S I do not have iCloud backup.

iPhone 13 Pro, iOS 26

Posted on Sep 20, 2025 9:19 PM

Top-ranking reply

Alancito

Level 7

29,994 points

Posted on Sep 21, 2025 4:40 AM

Abhish10 wrote: "...My battery health shows that it is at 73%..."

Abhish ~ That's well below Apple's suggested level of 80% for replacing the battery and explains the unexpected behaviour you're seeing. And it was probably at most 74 or 75% when you initiated the upgrade to iOS 26 just some days ago.

...So the upgrade didn't damage your iPhone — it just weakened further what was already a battery in need of teplacement. To avoid such situations as yours, I think Apple should advise users to check the Max Capacity before updating iOS.

iPhone Battery Service

About genuine iPhone batteries

Repair Provider Verification

(Articles found by searching Apple's Knowledge Base.)

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23 replies

TheLittles

Level 10

203,085 points

Oct 23, 2025 2:10 PM in response to Abhish10

“Would you suggest going through the steps you mentioned in this scenario without affecting any of my files and photos stored offline? Or would you suggest going to the service centre?”

———-

Boot Loop:

Having clarified it’s able to be used, then, perform what I mentioned is not applicable.

Oct 25, 2025 9:50 AM in response to Abhish10

My iPhone 16 Pro Max is doing it and I’m only at 99% maximum battery health. My phone battery doesn’t drain but the phone overheats and now it’s shuts off randomly. I restarted it and it still does it. I’ve had this phone less than a year and it was fine until iOS 26 was installed.

[Edited by Moderator]

Abhish10 Author

Level 1

13 points

Oct 26, 2025 6:33 AM in response to julinenenana

I think you might be in the same boat as I am. the official response that I got from Apple customer service was “Sounds like a you problem that you updated to iOS26”

If youre not deep in Apple ecosystem, weigh your options and make a wise decision after this experience. Unlucky for me, everything I had digitally was on an iPhone so I was forced to empty pockets for an unnecessary upgrade.

FYI, iPhone 17 is not bad so far. But has some really good bugs that I am afraid to fix by upgrading my software - because the last time I did that, my phone became an induction stove.

[Edited by Moderator]

Sep 20, 2025 9:41 PM in response to Abhish10

Apple’s advisor suggested to wait for the next update, likely next week. However, they should consider that we are using this as our primary mobile device.

Abhish10 Author

Level 1

13 points

Sep 21, 2025 12:26 AM in response to shanidchockly

I know right?! Does this mean we do not use our phones for the next week?

also, could you share if you got that information from the service centre or online support?

Abhish10 Author

Level 1

13 points

Sep 27, 2025 1:59 AM in response to Alancito

It shows that it is an authorised service provider on the link that you mentioned.

Abhish10 Author

Level 1

13 points

Sep 21, 2025 2:17 AM in response to TheLittles

Hi, thank you for the suggestion.

However, I don't think there was an issue while updating the iOS, I was able to use iOS26 for a couple of hours before the phone started acting up. To explain it better, I am able to use my phone as long as I keep it on an ice bag (I am not kidding - I am doing it for the very first time and doing it out of desperation so I can take some backup on iCloud.

Would you suggest going through the steps you mentioned in this scenario without affecting any of my files and photos stored offline? Or would you suggest going to the service centre?

LD150

Level 10

100,275 points

Sep 21, 2025 4:29 AM in response to Abhish10

Abhish10 wrote:

Also, while i agree with you, I feel it is wrong of Apple to provide me with an update that broke my phone. It was working completely fine until I updated to iOS 26. I think it would have been wiser for them to limit it to the phone that can actually handle the iOS. Now instead of buying a new phone , I will have to spend money to get a new battery?

Seems like a cost I could have easily avoided if Apple was transparent about the new iOS messing up older iphones. Just feel like an attempt to ensure they get a surge in support billings by enticing the users with new iOS and not telling them it has the ability to cause hardware damage.

I haven't done it yet, but definitely would feel cheated if I have to replace the battery tomorrow when I visit the service centre. Curious to know what the community feels about this.

The phone got here due to lack of servicing.

the battery should have been replaced at 79%
you MUST take an iCloud backup NOW while it is still working, or be fully sync’d with iCloud in every category, or you will lose your photos and data when it eventually fails

Phone keeps shutting off and restarts on its own after the iOS 26 update