Downgrading an iPhone From iOS 17 to iOS 16 is No Longer Possible

Following the release of iOS 17.0.3 earlier today, Apple has stopped signing iOS 16.6.1, iOS 17, and iOS 17.0.1, preventing iPhone users from downgrading to any of those software versions. Apple continues to sign iOS 17.0.2 for now.

ios 16 lock screen feature
Notably, this means that it is no longer possible to downgrade an iPhone from iOS 17 to iOS 16. It is not possible to downgrade to iOS 16.7.

Apple routinely stops signing older iOS releases over time in order to prevent users from downgrading to previous software versions.

iOS 17.1 is expected to be released later this month.

Related Forums: iOS 17, iPadOS 17, iOS 16

Popular Stories

Generic iOS 19 Feature Mock Light

iOS 19 Leak Reveals All-New Design

Friday January 17, 2025 2:42 pm PST by
iOS 19 is still around six months away from being announced, but a new leak has allegedly revealed a completely redesigned Camera app. Based on footage it obtained, YouTube channel Front Page Tech shared a video showing what the new Camera app will apparently look like, with the key change being translucent menus for camera controls. Overall, the design of these menus looks similar to...
2024 iPhone Boxes Feature

Apple Changes Trade-In Values for iPhones, iPads, Macs, and More

Thursday January 16, 2025 6:45 am PST by
Apple today adjusted estimated trade-in values for select iPhone, iPad, Mac, and Apple Watch models in the U.S., according to its website. Some values increased, while others decreased. The changes were not too significant, with most values rising or dropping by $5 to $50. We have outlined some examples below: Device New Value Old Value iPhone 15 Pro Max Up to $630 U ...
2024 App Store Awards

Apple Explains Why It Removed TikTok From the App Store in the U.S.

Sunday January 19, 2025 6:58 am PST by
Apple on late Saturday removed TikTok from the App Store in the U.S., and it has now explained why it was required to take this action. Last year, the U.S. passed a law that required Chinese company ByteDance to divest its ownership of TikTok due to potential national security risks, or else the platform would be banned. That law went into effect today, and companies like Apple and Google...
Generic iOS 18

Everything New in iOS 18.3 Beta 3

Thursday January 16, 2025 12:39 pm PST by
Apple provided the third beta of iOS 18.3 to developers today, and while the betas have so far been light on new features, the third beta makes some major changes to Notification Summaries and also tweaks a few other features. Notification Summary Changes Apple made multiple changes to Notification Summaries in response to complaints about inaccurate summaries of news headlines. For...
iOS 19 Roundup Feature

iOS 19 Rumored to Be Compatible With These iPhones

Saturday January 18, 2025 10:28 am PST by
iOS 19 will not drop support for any iPhone models, according to French website iPhoneSoft.fr. The report cited a source who said iOS 19 will be compatible with any iPhone that can run iOS 18, which would mean the following models: iPhone 16 iPhone 16 Plus iPhone 16 Pro iPhone 16 Pro Max iPhone 15 iPhone 15 Plus iPhone 15 Pro iPhone 15 Pro Max iPhone 14 iPhon...
iPad Pro vs iPhone 17 Air Feature

Here's How Thin the iPhone 17 Air Might Be

Friday January 17, 2025 3:38 pm PST by
For the last several months, we've been hearing rumors about a redesigned version of the iPhone 17 that Apple might call the iPhone 17 "Air," or something along those lines. It's going to replace the iPhone 17 Plus as Apple's fourth iPhone option, and it will be offered alongside the iPhone 17, iPhone 17 Pro, and iPhone 17 Pro Max. We know the iPhone 17 Air is going to be super slim, but...
mail categories macos

Apple's Redesigned Mail App is Expanding to the Mac — Here's When

Sunday January 19, 2025 6:02 am PST by
Apple plans to expand the iPhone's redesigned Mail app to the Mac starting with macOS 15.4, according to Bloomberg's Mark Gurman. The first macOS 15.4 beta should be made available in the coming weeks, and Apple has previously suggested that the iOS 18.4, iPadOS 18.4, and macOS 15.4 series of software updates will be released to the public in April. The revamped Mail app debuted on all...
apple power beats pro 2

Powerbeats Pro 2 Coming Soon: Apple to Announce Them 'Imminently'

Sunday January 19, 2025 8:25 am PST by
In September, Apple said that it would be launching Powerbeats Pro 2 in 2025, and it appears the wireless earbuds are coming very soon. Powerbeats Pro 2 images found in iOS 18 code In his Power On newsletter today, Bloomberg's Mark Gurman said the Powerbeats Pro 2 are "due imminently." In addition to Apple filing the Powerbeats Pro 2 in regulatory databases last month, Gurman said Apple is...

Top Rated Comments

Skyscraperfan Avatar
17 months ago
Users should always have the right to downgrade to the iOS version the iPhone came with. Apple does not have to nanny its users. If they prefer an old version, they should be able to keep it.

At the moment only rich users have the option of downgrading by buying a second iPhone in the first place just to have the option to return to the old version.

"Signing" iOS should only be a security measure to make sure that it really came from Apple, but Apple uses signing to make users keep a new version against their will.
Score: 20 Votes (Like | Disagree)
ebika Avatar
17 months ago
Reading the iOS 17 forum ('https://forums.macrumors.com/forums/ios-17.241/'), it seems like 17 is still a mess. I normally update fairly soon after releases, but I'm waiting for at least 17.1 this time.
Score: 11 Votes (Like | Disagree)
btrach144 Avatar
17 months ago
IDK, iOS 17 is pretty stable. Only real issue was a warm 15 PM but 17.0.3 seems to have solved that today.
Score: 6 Votes (Like | Disagree)
platinumaqua Avatar
17 months ago

Reading the iOS 17 forum ('https://forums.macrumors.com/forums/ios-17.241/'), it seems like 17 is still a mess. I normally update fairly soon after releases, but I'm waiting for at least 17.1 this time.
only the last version of every major release is worth upgrading to if reliability is important
Score: 5 Votes (Like | Disagree)
coolfactor Avatar
17 months ago

Users should always have the right to downgrade to the iOS version the iPhone came with. Apple does not have to nanny its users. If they prefer an old version, they should be able to keep it.

At the moment only rich users have the option of downgrading by buying a second iPhone in the first place just to have the option to return to the old version.

"Signing" iOS should only be a security measure to make sure that it really came from Apple, but Apple uses signing to make users keep a new version against their will.
That's a loaded topic.
[LIST=1]
* User chooses to remain on an older version of the operating system.
* Developers have moved on and only support the latest.
* User has an issue with an app due to an incompatibility between the app and their chosen operating system.

Should Apple or the developer have the burden of providing support because a user is refusing to keep up with the latest?

Users *do* have the choice to keep using a particular operating system by turning off automatic updates and never upgrading, so that argument doesn't hold water. The signing prevents downgrading *after* an upgrade has already taken place — either automatically, or manually. In both cases, the user is responsible for the upgrade happening, not Apple.
Score: 5 Votes (Like | Disagree)
Skyscraperfan Avatar
17 months ago

Users *do* have the choice to keep using a particular operating system by turning off automatic updates and never upgrading, so that argument doesn't hold water. The signing prevents downgrading *after* an upgrade has already taken place — either automatically, or manually. In both cases, the user is responsible for the upgrade happening, not Apple.
The user can't know the downsides of a new OS. He trusts Apple and hopes that there are no major downsides or even bugs. Of course there is a period when the user can test the new OS and still has the chance to downgrade, but what happens if the user discovers a flaw later?

If it is possible not to upgrade at all, why is it than not possible to downgrade later? I do not mean a real downgrade software, which would be complicate to implement, as you would need ways from every version down to every other version the phone technically supports. I was just thinking about reinstalling from a backup while keeping at least the compatible user data.
Score: 5 Votes (Like | Disagree)