Firmware

Apple stops signing iOS 12.5 following the release of iOS 12.5.1

Apple regularly releases software updates for the company’s many platforms, mobile and desktop alike. Interestingly, while most Apple’s software updates target either newer devices or upgrading the user experience of the company’s latest firmware iteration, a few heads turned when Apple released iOS 12.5.1 earlier this month to address a COVID-19 exposure notification bug that purportedly affected older iPhones.

Given that a software update was released, despite being for an older iteration of iOS, it should come as no surprise to anyone that Apple would soon close the signing window for what was previously the latest version of iOS 12. This happened Tuesday evening after Apple officially made the move to stop signing iOS 12.5, the predecessor of the newer iOS 12.5.1 update.

Apple unsigns iOS 14.2, 14.2.1, and 12.4.9, thwarting downgrades

After officially launching iOS 14.3 to the public last month with new features and improvements, Apple has closed the signing window for iOS & iPadOS 14.2 & 14.2.1, a move that prevents affected iPhone and iPad owners from restoring their handset’s firmware version to anything but the current iOS & iPadOS 14.3 release.

In addition to iOS & iPadOS 14.2 & 14.2.1, the company has officially started unsigning iOS 12.4.9, which prevents older handsets that are incapable of being upgraded to iOS or iPadOS 13 from downgrading from the newer iOS 12.5 release.

How to see your serial number, firmware version, and storage on Kindle

Holding a Kindle Paperwhite

If you own a Kindle Paperwhite, there may come a time when you want information about the device. Whether you need to troubleshoot a problem, want to see if you have the latest firmware, or simply want to know how much space you have left, it’s easier than you might think.

Here, we’ll show you how to find your serial number, firmware version, and available space on Kindle Paperwhite.

Apple no longer signing iOS 14.1 following launch of iOS 14.2

Apple unleashed iOS & iPadOS 14.2 to the general public last Thursday with a plethora of new Emojis, wallpapers, and other improvements. That said, no one should be astonished to learn that the company has stopped signing the older iOS & iPadOS 14.1 firmware this Thursday evening, just one week after the aforementioned release.

The unsigning of a particular version of firmware means that iPhone and iPad users can no longer officially downgrade to it via Finder or iTunes, and that’s because these platforms depend on ‘permission’ from Apple’s servers to continue the software restore on one of these devices. Third-party workarounds exist for the daring ones, of course.

Apple bars downgrades to iOS 14.0.1 following launch of iOS 14.1

Leave the iOS 14 beta

In a rather unsurprising move, Apple closed the signing window for iOS & iPadOS 14.0.1 Tuesday evening, one full week after unleashing iOS & iPadOS 14.1 to the general public to introduce various bug fixes and improvements for the company’s user base.

By closing the signing window for this particular version of firmware, Apple has effectively built a firewall against those wanting to downgrade their iPhone or iPad’s firmware for one reason or another. But this shouldn’t take anyone by shock; after all, Apple loves being in control of its users and signaling what they can and can’t do with their devices. This is nothing new.

Apple stops signing iOS 14.0, halting downgrades from iOS 14.0.1

Leave the iOS 14 beta

One week after officially releasing iOS & iPadOS 14.0 to the general public, Apple launched its first update for the new mobile operating system in the form of iOS & iPadOS 14.0.1 with minor usability bug fixes. As we approach one week after the release of the aforementioned update, it may not come as much of a surprise to most iPhone and iPad users that Apple has unsigned iOS 14.0 this evening.

When Apple unsigns a firmware, they are effectively preventing users from downgrading to that specific version of firmware. This means that anyone who updated to iOS 14.0.1 will not be able to go back to iOS 14.0 if they are, for any reason, unsatisfied with the latest update.

Apple closes signing window for iOS 13.6 to stop downgrades from iOS 13.6.1

Apple stopped signing iOS & iPadOS 13.6 Wednesday evening, a predictable move on the Cupertino-based company’s part that is known to prevent users of these particular devices from downgrading from the newer iOS & iPadOS 13.6.1 firmware that was released to the general public one week ago to address a ‘green tint’ issue exhibited by some OLED displays, among other things.

We say predictable because Apple follows this trend like clockwork every time the company releases a new version of iOS & iPadOS, but we digress…

Apple stops signing iOS 13.5.1, halting downgrades from iOS 13.6

Apple stopped signing iOS & iPadOS 13.5.1 Wednesday evening, a move on the company’s part that effectively prevents iPhone and iPad users from downgrading from the newer 13.6 release that was released to the general public exactly one week ago from today.

The company is notorious for preventing firmware downgrades because it doesn’t want users downgrading to versions that are vulnerable to exploits – whether those exploits are being used maliciously or for the sake of jailbreaking. Compelling users to upgrade to newer firmware when restoring also buffs Apple’s new firmware adoption statistics that the company frequently enjoys flaunting at Keynote presentations.

Apple pulls plug on iOS 13.5.5 beta 1 following release of unc0ver v5.2.0

Apple unsigned iOS & iPadOS 13.5 on Monday in a move intended to prevent downgrades to a publicly available jailbreakable firmware version. Hacker and unc0ver lead developer Pwn20wnd quickly responded to the act this week by releasing unc0ver v5.2.0 with support for iOS & iPadOS 13.5.5 beta 1, providing jailbreak hopefuls with a second chance to upgrade to jailbreakable firmware.

But as it would seem, this was a short-lived hoorah. Apple appears to have stopped signing iOS & iPadOS 13.5.5 beta 1 as of last night, effectively and once again preventing iPhone and iPad users from installing a jailbreakable firmware for the second time in the same week.

Apple blocks downgrades to jailbreakable firmware by unsigning iOS & iPadOS 13.5

Apple this evening stopped signing iOS & iPadOS 13.5, a move on the Cupertino-based company’s behalf that essentially prevents iPhone and iPad users from installing this particular version of its firmware whether downgrading from a newer version of the mobile operating system or upgrading from an earlier version.

The move comes approximately one week after Apple released iOS & iPadOS 13.5.1 to the general public specifically with the intention of patching the 0-day kernel vulnerability that Pwn20wnd implemented into the unc0ver jailbreak to add support for iOS & iPadOS 13.5, the latest version of Apple’s mobile operating system at the time.

Last chance to downgrade to iOS 13.5 and jailbreak with unc0ver

Apple on Monday released iOS and iPadOS 13.5.1 to the general public for the sole purpose of patching the new exploit in the unc0ver v5.0.0+ jailbreak tool, and as you might come to expect, Apple will soon unsign the jailbreakable iOS 13.5 firmware.

It usually takes the Cupertino-based company a week or two after a new firmware release before it stops signing an older version of iOS or iPadOS, but in recent memory, just one week has been a lot more common. By doing this, Apple can leave its user base with no option of downgrading or upgrading back to iOS or iPadOS 13.5, effectively preventing users from jailbreaking.

Downgrades from iOS 13.5 halted as Apple stops signing iOS 13.4.1

Apple is no longer signing iOS or iPadOS 13.4.1 as of this evening, a move that prevents iPhone and iPad users from downgrading from the iOS and iPadOS 13.5 software updates that the Cupertino-based tech giant released to the general public just last week.

Downgrading iOS device firmware isn’t a common necessity, but it can be necessary if or when Apple releases a software update that introduces bugs or instability to its devices. This isn’t a particularly common thing to happen, but it did transpire last October when iOS 13.2 was found to be ‘too aggressive’ with backgrounding restrictions, compelling many users to downgrade until a software update could be released to fix the issue.