Apple Stores Get New Diagnostic Tool for iPhones With Unexpected Restart Issues

Apple Stores and Apple Authorized Service Providers have a new tool in their arsenal to determine if a customer's iPhone is unexpectedly restarting.

iPhone Apple Logo Boot
When a customer with an iPhone 11 or newer indicates their device is unexpectedly restarting, Apple Stores and Apple Authorized Service Providers can run a new "System Stability" diagnostic tool, which will evaluate the device's analytics logs to determine if multiple unexpected restarts have taken place over the previous 14 days.

If the diagnostic determines unexpected restarts have taken place, Apple advises technicians to proceed with a hardware repair, according to an internal memo obtained by MacRumors. If the diagnostic passes, Apple advises technicians to direct the customer to a new support document with hardware and software troubleshooting tips.

The new diagnostic tool provides Apple technicians with a faster way to determine if a customer's iPhone is unexpectedly restarting compared to existing methods, such as restoring the device or manually reviewing analytics logs for kernel panics.

The new "System Stability" diagnostic suite is part of Apple Service Toolkit 2.

Popular Stories

iOS 26

iOS 26.4 and iOS 27 Features Revealed in New Leak

Friday December 12, 2025 10:56 am PST by
Macworld's Filipe Espósito today revealed a handful of features that Apple is allegedly planning for iOS 26.4, iOS 27, and even iOS 28. The report said the features are referenced within the code for a leaked internal build of iOS 26 that is not meant to be seen by the public. However, it appears that Espósito and/or his sources managed to gain access to it, providing us with a sneak peek...
iOS 26

iOS 26.2 Coming Soon With These 8 New Features on Your iPhone

Thursday December 11, 2025 8:49 am PST by
Apple seeded the second iOS 26.2 Release Candidate to developers earlier this week, meaning the update will be released to the general public very soon. Apple confirmed iOS 26.2 would be released in December, but it did not provide a specific date. We expect the update to be released by early next week. iOS 26.2 includes a handful of new features and changes on the iPhone, such as a new...
iOS 26

Apple Releases iOS 26.2 With Alarms for Reminders, Lock Screen Changes, Enhanced Safety Alerts and More

Friday December 12, 2025 10:10 am PST by
Apple today released iOS 26.2, the second major update to the iOS 26 operating system that came out in September, iOS 26.2 comes a little over a month after iOS 26.1 launched. ‌iOS 26‌.2 is compatible with the ‌iPhone‌ 11 series and later, as well as the second-generation ‌iPhone‌ SE. The new software can be downloaded on eligible iPhones over-the-air by going to Settings >...
AirPods Pro Firmware Feature

Apple Releases New Firmware for AirPods Pro 2 and AirPods Pro 3

Thursday December 11, 2025 11:28 am PST by
Apple today released new firmware designed for the AirPods Pro 3 and the prior-generation AirPods Pro 2. The AirPods Pro 3 firmware is 8B30, up from 8B25, while the AirPods Pro 2 firmware is 8B28, up from 8B21. There's no word on what's include in the updated firmware, but the AirPods Pro 2 and AirPods Pro 3 are getting expanded support for Live Translation in the European Union in iOS...
macOS Tahoe 26 Thumb

Apple Releases macOS Tahoe 26.2 With Edge Light

Friday December 12, 2025 10:08 am PST by
Apple today released macOS Tahoe 26.2, the second major update to the macOS Tahoe operating system that came out in September. macOS Tahoe 26.2 comes five weeks after Apple released macOS Tahoe 26.1. Mac users can download the macOS Tahoe update by using the Software Update section of System Settings. macOS Tahoe 26.2 includes Edge Light, a feature that illuminates your face with soft...
AirTag 2 Mock Feature

Apple AirTag 2: Four New Features Found in iOS 26 Code

Thursday December 11, 2025 10:31 am PST by
The AirTag 2 will include a handful of new features that will improve tracking capabilities, according to a new report from Macworld. The site says that it was able to access an internal build of iOS 26, which includes references to multiple unreleased products. Here's what's supposedly coming: An improved pairing process, though no details were provided. AirTag pairing is already...
Apple Foldable Thumb

Leak Reveals Foldable iPhone Details

Monday December 15, 2025 9:09 am PST by
The first foldable iPhone will feature a series of design and hardware firsts for Apple, according to details shared by the Weibo leaker known as Digital Chat Station. According to a new post, via machine translation, Apple is developing what the leaker describes as a "wide foldable" device, a term used to refer to a horizontally oriented, book-style foldable with a large internal display....
ipados 26 1 slide over

Apple Releases iPadOS 26.2 With Multitasking Improvements

Friday December 12, 2025 10:09 am PST by
Apple today released iPadOS 26.2, the second major update to the iPadOS 26 operating system released in September. iPadOS 26.2 comes a month after iPadOS 26.1. The new software can be downloaded on eligible iPads over-the-air by going to Settings > General > Software Update. iPadOS 26.2 continues with the multitasking improvements that were added with iPadOS 26.1. You can now drag and...

Top Rated Comments

dumastudetto Avatar
44 months ago
One of the big reasons I'm so proud to be an Apple customer is their unwavering commitment to serving the needs of all us - be it the production of industry-leading products, software updates, best-in-class hardware support, expert repair, and going the extra mile for each and every one of us.
Score: 22 Votes (Like | Disagree)
iAFC Avatar
44 months ago

It might just be a coincidence but earlier this week I started getting random restarts on my iPhone 13 Pro running 15.1.1
15.1.1? Why not update it to 15.6?
Score: 6 Votes (Like | Disagree)
planteater Avatar
44 months ago

Holy crap, I was JUST in the Apple Store yesterday and a customer was complaining about his iPhone restarting. I was there to get replacement AirPods and this guy kept butting into my conversation with the Genius. I hope he got his issue resolved.
If he was butting into my conversations, I’d wish him happy reboots.
Score: 5 Votes (Like | Disagree)
senttoschool Avatar
44 months ago
This is groundbreaking tech. Only took Apple 15 years to develop this.


const unexpectedRestarts = select * from logs where restart = 'Unexpected'

If (unexpectedRestarts.length > 0) {
print("Need repair")
}
Score: 5 Votes (Like | Disagree)
gramateur Avatar
44 months ago

I haven't had restart issues, but my 13 Pro has been very buggy since I got it. Maybe 5% of the time when opening the camera from the lock screen, the whole thing freezes and needs to be restarted. Same goes for making phone calls, and a few other strange behaviors.

Anyone had luck resolving these?
I used to work for AppleCare. If the following doesn’t work then call AppleCare (it’s free) and request a remote diagnostic and go from there. https://support.apple.com/en-us/HT201252
Score: 2 Votes (Like | Disagree)
Aaronp613 Avatar
44 months ago
It might just be a coincidence but earlier this week I started getting random restarts on my iPhone 13 Pro running 15.1.1
Score: 2 Votes (Like | Disagree)