Skip to main content

Greenp0ison finally unleashes iOS 4.2.1 untethered jailbreak

Image used with permission by copyright holder

Have a jail broken phone? Make sure to check out our picks for the best jailbreak apps and games.

Jailbreaking one’s iDevice is an increasingly common practice as more users realize that any inherent dangers are made moot by Apple’s System Restore function. The advantages offered by jailbreaking are appealing, particularly with apps like MyWi, which turned your device into a Wi-Fi hotspot long before the functionality was announced as coming with the iOS 4.3 update. The latest version of Apple’s operating system, 4.2.1, was released back in November, but iDevice users have been kept waiting since then for a viable jailbreak method… until now.

Recommended Videos

Last night, Chronic Dev Team’s Joshua Hill took to his Twitter account with a brief message: “Go get it. www.greenpois0n.com.” The new version of greenp0ison, labeled “rc5” — release candidate 5 — is now up for download. Only the Mac version is currently available, but Hill promised in his Twitter feed that a Windows version is coming soon.

The new greenp0ison release is notable because it allows for an untethered jailbreak of your iDevice. Prior to rc5, iOS 4.2.1 could only be subjected to a tethered jailbreak, meaning that anytime the device needed a reboot it would first need to be connected — “tethered” — to a computer running the proper software. As anyone who uses the Cydia app store knows, installing a jailbreak app or applying updates to the same frequently requires just that sort of reboot. The latest greenp0ison release removes that requirement.

iPhone 4 users are currently being advised to steer clear of rc5 for now. This really only applies to those who wish to unlock their device however, as the jailbreak updates the device’s baseband firmware, making the use of a custom SIM card an impossibility. There also appear to be a few issues for some installing Cydia; users encountering this issue are advised to use redsn0w 0.9.7 post-jailbreak to get it installed and running. As the release is still now, updates are sure to come soon. Windows users are going to have to wait regardless, but Mac-folk who aren’t particularly savvy in the mobile tech department may want to also hold off on the jailbreak as well, until those initial launch issues are sorted out and a more stable option is available.

Regardless, after months of waiting, an untethered iOS 4.2.1 jailbreak is finally here. Good news for anyone who like to squeeze every last bit of functionality out of their iDevice.

Adam Rosenberg
Former Digital Trends Contributor
Previously, Adam worked in the games press as a freelance writer and critic for a range of outlets, including Digital Trends…
The 10 best messaging apps for Android and iOS in 2024
best messaging apps.

Want to learn more about which messaging app best suits your needs? WhatsApp, Telegram, and Signal are among the most secure picks, with end-to-end encryption to keep your chats safe. But there are also unique apps like Dust, where messages self-destruct after 24 hours, and Discord, which lets gamers easily chat while playing together. Meanwhile, Snapchat and Kik are popular for younger crowds with fun filters and the ability to join large group chats.

With so many messaging apps out there offering features like video calls, file sharing, and disappearing messages, it can be hard to choose the best one. That's why we've tested 10 of the most popular options on Android and iOS. Check out the full rundown with all the must-know details. They run on the Galaxy Z Fold 6, iPhone 16, and anything else that runs on Android or iOS.
WhatsApp

Read more
A hidden iOS 18.1 upgrade made it harder to extract data from iPhones
A person holding the Apple iPhone 16 Plus.

Apple Intelligence was the most notable upgrade that arrived on iPhones with the iOS 18 series of updates. But it seems Apple reinforced the security protocols in the background that could prevent bad actors from gaining unauthorized access to iPhones that haven’t been unlocked in a while by their legitimate owner.

Earlier this month, 404Media reported that law enforcement officials are troubled by iPhones that are mysteriously rebooting. Citing a report courtesy of officials in Michigan, the outlet notes that the reboots are hampering the ability to access what’s stored on the phones through brute-force unlock methods.

Read more
Apple quietly nixed this Apple Intelligence feature from iOS 18.2
Image Playground on iPad.

One of the most highly anticipated features of Apple Intelligence, Image Playground, has finally launched in the iOS 18.2 developer and public betas. This artificial intelligence tool, announced in June, enables users to create cartoon-like images from text descriptions. Unfortunately, at least in the beta version, one of Image Playground's announced features is missing.

As first noted on X (formerly Twitter) by @nicolas09f9 (via MacRumors), Image Playground was once expected to feature three design styles: Animation, Illustration, and Sketch. For whatever reason, the latter isn't a choice in the beta.

Read more