Apple Stops Signing iOS 13.3 Following Release of iOS 13.3.1 - MacRumors
Skip to Content

Apple Stops Signing iOS 13.3 Following Release of iOS 13.3.1

by

IPSWFollowing the release of iOS 13.3.1 on January 28, Apple has stopped signing iOS 13.3, which means downgrading to that version of iOS is no longer possible.

iOS 13.3 was a major update that included Communication Limits for Screen Time, support for NFC, USB, and Lightning FIDO2-compliant security keys in Safari, and more.

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 13.3.1 is the current publicly available version of iOS, with the update introducing a toggle for the U1 Ultra Wideband chip in the newest iPhones along with various bug fixes and improvements.

Developers and public beta testers can also download iOS 13.4, an upcoming update that includes a new toolbar in the Mail app, iCloud Folder Sharing, new Memoji stickers, and more.

Top Rated Comments

B
benshive
85 months ago
Conveniently there’s a jailbreak for A12/A13 devices being released in the next 24 hours that supports up to 13.3.
Score: 5 Votes (Like | Disagree)
M
MattMJB0188
85 months ago
Proudly still running 12.4.1 on my iPhone 8.
Score: 3 Votes (Like | Disagree)
thadoggfather Avatar
thadoggfather
85 months ago

Conveniently there’s a jailbreak for A12/A13 devices being released in the next 24 hours that supports up to 13.3.
haha yeah * following tweets by pwn20wnd of a 13.3 jailbreak

13.3.1 has been out for a bit now
Score: 3 Votes (Like | Disagree)
S
supergt
85 months ago

Proudly still running 12.4.1 on my iPhone 8.
I’ll do you .1 better. Running 12.4 on my Xs.
Score: 2 Votes (Like | Disagree)
R
rforno
85 months ago

Any minute now Apple will activate the daily nag servers to notify all iOS users to install iOS 13 for us non-conformists. It's been quiet for a few weeks.
No kidding. Talk about living inside the nanny state....as a power user and someone who does NOT YET want to update my IP8 (and knows full well the 'consequences' for not being currently patched) I'm so tired of Cupertino telling me what I should be doing.
Score: 1 Votes (Like | Disagree)
thadoggfather Avatar
thadoggfather
85 months ago
I’m actually pretty happy with 13.3 so far ! My first foray into iOS 13 across a few devices
Score: 1 Votes (Like | Disagree)
Read All Comments

Popular Stories

Foldable iPhone 2023 Feature 1

Gurman: iPhone Ultra Wows Early Testers, Except for Its Camera

Sunday August 23, 2026 11:19 am PDT by
Apple's upcoming foldable iPhone Ultra is winning over the few people who have had hands-on time with the device, though the camera setup may leave some users wanting, according to Bloomberg's Mark Gurman. Writing in his latest Power On newsletter, Gurman says people who have used the device – which is reportedly referred to internally as the iPhone Ultra – like how it fits in your...
Read Full Article • 218 comments
iPhone 18 Pro Dark Cherry Feature

iPhone 18 Pro and iPhone Ultra: When Will Apple Event Be Announced?

Monday August 24, 2026 6:45 am PDT by
It is now late August, meaning that Apple's annual iPhone event is just around the corner. Below, we take a look at when the event might be held this year. This September, Apple is expected to unveil the iPhone 18 Pro, iPhone 18 Pro Max, and an all-new foldable iPhone that will reportedly be named the iPhone Ultra. The regular iPhone 18, a lower-end iPhone 18e, and the iPhone Air 2 are not...
Read Full Article • 19 comments
apple magic keyboard with glyphs 2026 refresh

Apple Quietly Refreshes Magic Keyboards

Tuesday August 25, 2026 7:22 am PDT by
Apple today quietly introduced updated Magic Keyboard models with revised U.S. English key labeling. On the new keyboards, the tab, caps lock, shift, return, and delete keycaps are labeled with glyphs rather than edge text. On the full-size models with a numeric keypad, the change goes further, with the home, page up, page down, end, clear, and enter keys also swapping their text labels for...
Read Full Article • 119 comments