Apple Stops Signing iOS 15.3 Following iOS 15.3.1 Release, Downgrading No Longer Possible

Following the release of iOS 15.3.1 on February 10, Apple has stopped signing iOS 15.3, the previously available version of iOS that came out in late January. Because iOS 15.3 is no longer being signed, it is not possible to downgrade to that version of iOS if you've updated to iOS 15.3.1.

ios 15
Apple routinely stops signing older versions of software updates after new releases come out in order to encourage customers to keep their operating systems up to date.

iOS 15.3 was a bug fix update that addressed a significant Safari bug that could leak browsing activity, while iOS 15.3.1 was another bug fix update further addressing WebKit vulnerabilities.

Popular Stories

iPhone 17 Pro 34ths Perspective

iPhone 17 Pro Launching Later This Year With These 10 New Features

Sunday March 23, 2025 10:00 am PDT by
While the iPhone 17 Pro and iPhone 17 Pro Max are not expected to launch until September, there are already plenty of rumors about the devices. Below, we recap key changes rumored for the iPhone 17 Pro models as of March 2025: Aluminum frame: iPhone 17 Pro models are rumored to have an aluminum frame, whereas the iPhone 15 Pro and iPhone 16 Pro models have a titanium frame, and the iPhone ...
maxresdefault

Apple Releases iOS 18.4 With Priority Notifications, Ambient Music, New Emoji and More

Monday March 31, 2025 10:03 am PDT by
Apple today released iOS 18.4 and iPadOS 18.4, the fourth major updates to the iOS 18 and iPadOS 18 operating system updates that came out last year. iOS 18.4 and iPadOS 18.4 come two months after Apple released iOS 18.3 and iPadOS 18.3. Subscribe to the MacRumors YouTube channel for more videos. The new software can be downloaded on eligible iPhones and iPads over-the-air by going to...
top stories 2025 03 29

Top Stories: WWDC 2025 Announced, iPhone 17 Pro and iOS 19 Rumors, and More

Saturday March 29, 2025 6:00 am PDT by
Apple's big developer event is a little over two months away, and rumors about what we can expect to see in Apple's next major operating system updates are becoming increasingly frequent. A public release of iOS 18.4 is also imminent with a number of updates and improvements, although we won't be getting the major Apple Intelligence Siri upgrades that had reportedly been planned for this...
Magic Mouse Green

What to Expect From the Magic Mouse 3

Saturday March 29, 2025 10:15 am PDT by
Apple is reportedly working on a new Magic Mouse. Below, we recap what to expect. The two key rumors for the Magic Mouse 3 so far include a relocated charging port, along with a more ergonomic design. It was briefly rumored that the Magic Mouse 3 would also feature voice control, but that was misinterpreted information. Relocated Charging Port While the Magic Mouse switched from...
iOS 18

iOS 18.4 Expected Next Week - Here Are the Release Notes

Friday March 28, 2025 2:01 pm PDT by
With the second release candidate of iOS 18.4 that Apple seeded out today, the company finally provided us with release notes that give a full rundown on what to expect. There's an Apple Vision Pro app, new Apple Intelligence features for notifications and additional language support, plus an Apple News Food feature for Apple News+ subscribers, and several updates that should improve the...
Foldable iPhone 2023 Feature Homescreen

Six Things to Know About Apple's Upcoming Foldable iPhone

Friday March 28, 2025 3:54 pm PDT by
We've been hearing rumors about a foldable iPhone for almost a decade now, but it looks like we might finally see the device come to fruition in 2026. We're going to be waiting many more months for the foldable iPhone, but so far we're hearing good things. Apple wants to make it creaseless. It's taken Apple multiple years to design a foldable iPhone that it's satisfied with because Apple ...
iOS 19 visionOS UI Elements

Apple Codename Provides Clue About iOS 19's Rumored New Design

Sunday March 30, 2025 6:40 am PDT by
Multiple sources have claimed that iOS 19 will introduce a new design with more translucent buttons, menus, notification banners, and more, and there is now another clue that points towards this glass-like appearance. Bloomberg's Mark Gurman today said the new design project is codenamed "Solarium" internally. A solarium is a room with glass walls that allow in plenty of sunlight, so this...
macOS Sequoia Feature

Apple Releases macOS Sequoia 15.4 With Mail Categorization and More

Monday March 31, 2025 10:04 am PDT by
Apple today released macOS Sequoia 15.4, the fourth major update to the macOS Sequoia operating system that launched in September. macOS Sequoia 15.4 comes two months after the launch of macOS Sequoia 15.3. Mac users can download the ‌‌macOS Sequoia‌‌ update through the Software Update section of System Settings. It is available for free on all Macs able to run macOS 15. With...

Top Rated Comments

Thebrochure Avatar
41 months ago
This is one of those things that lawmakers should step up to the plate and end. You should always be allowed to go back to whatever iOS you want, as long as it's not older than the original version that came with your phone.
Score: 8 Votes (Like | Disagree)
JosephAW Avatar
41 months ago
Apple should allow the ability to reinstall the original iOS version for each device and then the user can upgrade to each successive iOS major releases just like they allowed my iPhone 4S to reinstall iOS 6 and then iOS 8 and then iOS 9. I stopped at iOS 8.
Score: 7 Votes (Like | Disagree)
BaltimoreMediaBlog Avatar
41 months ago

This is one of those things that lawmakers should step up to the plate and end. You should always be allowed to go back to whatever iOS you want, as long as it's not older than the original version that came with your phone.
I totally AGREE and the IOS 10 to 11 transition should have resulted in a Class Action lawsuit for deleting nearly a hundred apps from my iPhone 5s without my permission, and Apple shipping it back to me less functional after a battery repair that I paid for too when others got them for free. So for me it was a kick in the balls bigtime!

THIS SHOULD BE ILLEGAL!
Score: 6 Votes (Like | Disagree)
MysticCow Avatar
41 months ago
I despise the whole “no longer signing” garbage. If there’s an issue and you NEEEEEED to downgrade it, it isn’t possible. You’re just plain screwed.
Score: 5 Votes (Like | Disagree)
Octavius8 Avatar
41 months ago
How about first fixing the Bluetooth issue on the cars?. (Disconnecting every few seconds after iOS 15.3).
Apple support suggest “car issue”, of course… 4 iPhone generations, no problem, iOS 15 on my 13Pro, no problem, iOS 15.3 dissaster!. Will Apple Pay me a new car now that they broke basic Bluetooth calling with a car????
Score: 4 Votes (Like | Disagree)
NMBob Avatar
41 months ago

I despise the whole “no longer signing” garbage. If there’s an issue and you NEEEEEED to downgrade it, it isn’t possible. You’re just plain screwed.
You would think if congress wanted to do something useful they would look into something like th....never mind.
Score: 4 Votes (Like | Disagree)