Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

MacRumors

macrumors bot
Original poster
Apr 12, 2001
63,560
30,891


Apple today stopped signing iOS 17.3.1 preventing iPhone users from downgrading to that version of iOS. iOS 17.3.1 is no longer being signed following the March 5 release of iOS 17.4, an update that introduced app ecosystem changes in the EU, new emoji, and more.

iOS-17.3.1-Feature.jpg

Apple routinely stops signing older versions of iOS, so it is not unusual that the iOS 17.3.1 update is no longer available. Apple prevents users from installing older versions of iOS to encourage customers to keep their operating systems up to date and to prevent downgrading to older, less secure versions of the iPhone operating system.

iOS 17.4 is now the only publicly released version of iOS available.

Article Link: Apple Stops Signing iOS 17.3.1, Downgrading No Longer Available
 

Shirasaki

macrumors P6
May 16, 2015
15,615
10,922
This kind of tactic basically means Apple can always produce buggy software and user must stuff it cause there’s no alternative. Cool to keep users up to date duh.
 

MartyvH

Contributor
Sep 16, 2017
527
376
I’m curious about this.

17.3.1 is still signed according to ipsw dot me and I was able to Restore it to my 13 mini in iTunes on March 28. Why does this article from March 13 say it’s no longer signed?

Also, both of the two builds of 17.4.1 are signed but 17.4 is not.

What’s going on?
 

Jhonjhon236

macrumors member
Aug 18, 2022
85
407
I’m curious about this.

17.3.1 is still signed according to ipsw dot me and I was able to Restore it to my 13 mini in iTunes on March 28. Why does this article from March 13 say it’s no longer signed?

Also, both of the two builds of 17.4.1 are signed but 17.4 is not.

What’s going on?
It was unsigned but mysteriously it got resigned for some unknown reason. Been resigned for over a week.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.