An alternative "Jailbroken" firmware for the Nt mini was "'unofficially'" released on February 3, 2017, by Analogue's lead electrical engineer, Kevin Horton.
In iOS 6.1.2 (and possibly higher), a hole in the compatibility for the app has allowed jailbroken iPad users to use the native Nike + iPod iPhone and iPod app by moving the app bundle and setting permissions for the app.
Researchers demonstrated within hours of the product release that the third-generation iPad can be "jailbroken" to use applications and programs that are not authorized by Apple. The third-generation iPad can be jailbroken with Redsn0w 0.9.12 or Absinthe 2.0. Jailbreaking violates the factory warranty. One of the main reasons for jailbreaking is to expand the feature set limited by Apple and its App Store. Most jailbreaking tools automatically install Cydia, a native iOS APT client used for finding and installing software for jailbroken iOS devices. Many apps unapproved by Apple are extensions and customizations for iOS and other apps. Users install these programs to personalize and customize the interface, adding desired features and fixing annoyances, and simplify app development by providing access to the filesystem and command-line tools. However, Apple often patches the exploits used by jailbreaking teams with iOS updates. This is why the iPad 3rd Generation is not always jailbreakable.
Since iOS 8, third party keyboards, distributed through the App Store, are allowed. Previously, they were only available on jailbroken iPhones.
It is available on Solaris, Linux, OpenBSD, FreeBSD, NetBSD, QNX, macOS and Windows XP and later. OpenVPN is available for mobile phone operating systems (OS) including Maemo, Windows Mobile 6.5 and below, iOS 3GS+ devices, jailbroken iOS 3.1.2+ devices, Android 4.0+ devices, and Android devices that have had the Cyanogenmod aftermarket firmware flashed or have the correct kernel module installed. It is not compatible with some mobile phone OSes, including Palm OS. It is not a "web-based" VPN shown as a web page such as Citrix or Terminal Services Web access; the program is installed independently and configured by editing text files manually, rather than through a GUI-based wizard. OpenVPN is not compatible with VPN clients that use the IPsec over L2TP or PPTP protocols. The entire package consists of one binary for both client and server connections, an optional configuration file, and one or more key files depending on the authentication method used.
In August 2015 the KeyRaider malware was discovered that affects only jailbroken iPhones.
Software packages are downloaded directly to the iOS device. Apps are installed in the same location as Apple's own applications, the directory. Jailbroken devices can also still buy and download apps normally from the official App Store. Most Jailbreaking tools (each of them supporting a specific set of devices and iOS versions) install Cydia automatically, while others provide a choice to the user.
Upon release, players on jailbroken iOS devices were unable to fire weapons in-game, which caused some controversy within the gaming community. Square Enix later confirmed and released a patch to fix the issue. The game was later patched to both include support for iPad 2 models and fix bugs and glitches along with improvements to the artificial intelligence (AI). Shortly after the announcement, the game was also confirmed for Android devices. This version was eventually released on January 22, 2014.
iOS systems including the iPhone, iPad, and iPod touch have been subject to iOS jailbreaking efforts since they were released, and continuing with each firmware update. iOS jailbreaking tools include the option to install Cydia or Sileo, third-party alternatives to the App Store, as a way to find and install system tweaks and binaries. To prevent iOS jailbreaking, Apple has made the device boot ROM execute checks for SHSH blobs in order to disallow uploads of custom kernels and prevent software downgrades to earlier, jailbreakable firmware. In an "untethered" jailbreak, the iBoot environment is changed to execute a boot ROM exploit and allow submission of a patched low level bootloader or hack the kernel to submit the jailbroken kernel after the SHSH check.
As a result of rejection from the Apple Store, Google released its Google Voice iPhone application as a web app in January 2010, and certain apps like GV Mobile are available through Cydia on jailbroken iPhones.
iOS jailbreaking was often considered illegal in the United States until a recent ruling by the U.S. Copyright Office declaring that jailbreaking an iPhone or other mobile device would no longer violate copyright law. However, simultaneously, there is ongoing prosecution against hackers of videogame consoles under anti-circumvention violations of the DMCA. A main complication, in many cases, is the profiting from selling jailbroken or rooted equipment as a value-added service. At least some accused deny these charges and claim only to be making back-ups of legally purchased games.
Cydia is a package manager mobile app for iOS that enables a user to find and install software not authorized by Apple on jailbroken iPhones, iPads and iPod touch devices. It also refers to digital distribution platform for software on iOS accessed through Cydia software. Many of the software packages available through Cydia are free of charge, although some require purchasing. Cydia is developed by Jay Freeman (also called "saurik") and his company, SaurikIT. The name "Cydia" is a reference to the moth genus Cydia, notably the codling moth (with a scientific name of Cydia pomonella), which is the proverbial "worm in the apple."
Kodi for iOS (formerly XBMC for iOS), a full port of Kodi to Apple's iOS operating-system, was released publicly on 20 January 2011. It supported both 720p and 1080p hardware accelerated video decoding of H.264 videos, and was compatible with Apple's iDevices that use Apple A4 or Apple A5 (ARM-based) processors with a jailbroken iOS operating-system.
MewSeek was originally iSlsk, a Soulseek client for iPod Touch and iPhone clients running jailbroken versions of iOS. MewSeek no longer supports Soulseek.
On jailbroken devices, unsigned applications (applications installed through Cydia) cannot be deleted by the traditional method of holding a finger on the application and selecting delete as they are installed as System applications. Instead, they need to be removed through Cydia, unless CyDelete is installed, which allows for that method to be used.
The discovery of the vulnerabilities dated 10 days before the 9.3.5 update was released. Arab human rights defender Ahmed Mansoor received a suspicious text message with a link and sent it to Citizen Lab. An investigation ensued with collaboration from Lookout that revealed that if Mansoor clicked the link, it would have jailbroken his phone and implanted it with the spyware. Citizen Lab linked the attack to an Israeli surveillance company known as NSO Group that sells Pegasus to governments for "lawful interception".
The core system of Pirni, written in C, is open-source software, and licensed under the GNU General Public License. Pirni Pro is the succeeding version of Pirni, and is commercial software, available in the Cydia Store, for jailbroken Apple devices.
Before the SDK was released, third parties were permitted to design "Web Apps" that would run through Safari. Unsigned native applications are also available for "jailbroken" phones. The ability to install native applications onto the iPhone outside of the App Store is not supported by Apple, the stated reason being that such native applications could be broken by any software update, but Apple has stated it will not design software updates specifically to break native applications other than those that perform SIM unlocking.
The first iPhone worm, iKee, appeared in early November 2009, created by a 21-year-old Australian student in the town of Wollongong. He told Australian media that he created the worm to raise awareness of security issues: jailbreaking allows users to install an SSH service, which those users can leave in the default insecure state. In the same month, F-Secure reported on a new malicious worm compromising bank transactions from jailbroken phones in the Netherlands, similarly affecting devices where the owner had installed SSH without changing the default password.
Dynamically animated backgrounds have also been introduced in iOS 7 and later versions, however they are restricted to the ones provided by Apple. Jailbroken iOS devices can download other dynamic backgrounds.