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

Four iPhone 18 Pro Colors Mock Feature

iPhone 18 Pro: Pre-Orders and Release Date

Thursday August 20, 2026 8:00 am PDT by
Apple has yet to reveal when the iPhone 18 Pro and iPhone Ultra will be announced and released, but the dates usually follow a familiar pattern. As usual, the iPhone event is expected to take place in the first half of September. Labor Day falls on September 7 this year. The last time the holiday was on that day was in 2020, but the iPhone event that year was delayed until October due to...
Read Full Article • 20 comments
macOS 27 next to MacBook Pro Running macOS 27

macOS Golden Gate Marks the End of an Era

Thursday August 20, 2026 2:19 pm PDT by
macOS 27 Golden Gate is not compatible with any Macs with Intel processors, marking the end of an era. The update, which is currently in beta ahead of a release later this year, is limited to Apple silicon Macs with an M1 chip or newer. Last year, Apple said that macOS 26 Tahoe would be the final macOS release compatible with Intel-based Macs, so this was an expected development. Intel...
Read Full Article
Aston Martin CarPlay Ultra Screen

Apple Says CarPlay Ultra is Coming to These Vehicle Brands

Wednesday August 19, 2026 12:53 pm PDT by
Last year, Apple launched CarPlay Ultra, the long-awaited next-generation version of its CarPlay software system for vehicles. More than a year later, CarPlay Ultra is still limited to Aston Martin's latest luxury vehicles, but that should change in the foreseeable future. In May 2025, Apple said many other vehicle brands planned to offer CarPlay Ultra, including Hyundai, Kia, and Genesis. ...
Read Full Article