Guides

iPhone iOS 5 Jailbreak Instructions (Redsn0w)

Thanks to iPhone Dev-Team the redsn0w jailbreak tool is updated to jailbreak the iPhone 4 and iPhone 3GS running iOS 5. This is a work in progress designed to help app developers update their products for the latest firmware. As such, Dev-Team considers redsn0w a beta release and warns early adopters there may be lingering bugs in the firmware.

Cydia jailbreak app store icon

Before you go ahead and read the tutorial, be aware this does not apply to the iPhone 4S or iPad 2. Jailbreak solutions for these two devices are under development and have not been released. When it comes to the iPhone 4 and 3GS, most devices will require a tethered jailbreak.

How to Downgrade iPhone iOS 5 Firmware to 4.3.3

Are you missing some key jailbreak tweaks now that you've updated your iPhone 4 or 3GS to iOS 5 firmware? Already tired of dealing with all of the shortcomings in iOS 5 notification center? Luckily if you have saved your SHSH blobs you can easily downgrade and return your iPhone to a jailbroken state (and reinstall LockInfo!)

SHSH blobs saved to Cydia

In order to downgrade you must have saved SHSH blobs. Pictured above are how saved SHSH files appear for each firmware version in Cydia, when they are saved to Saurik's server. Follow these steps to downgrade to earlier firmware, including iOS 4.3.3 for an untethered jailbreak with JailbreakMe.

HOWTO: Untethered iOS 4.2.1 iPhone Jailbreak Instructions (Redsn0w)

The long awaited untethered jailbreak for iOS 4.2.1 is here, albeit in limited fashion. The instructions below pertain to Redsn0w 0.9.7b1, a beta release of the so-called "backup plan" untethered jailbreak. This release is not the final release and, being a beta, requires a bit more effort than the eventual final release should. This jailbreak is also limited to the iPhone 4, iPad and iPod Touch 4G.

The following provides step-by-step instructions on how to jailbreak your iPhone (or other iOS device) using Redsn0w 0.9.7b1.

How to Fix iPhone iOS 4.1 Battery Life Problems

Some unlucky iPhone users got the short end of the battery life after updating to iOS 4.1. Users have reported battery life issues among other problems with prior firmware updates (remember iPhone OS 3.1?) but now some running iOS 4.1 are seeing their battery percentage drop to zero within hours.

apple iphone ios 4.1 3GS battery life bug

Online discussion forums are hopping with activity from iPhone 4 and iPhone 3GS users complaining of shortened battery life and warm phones running iOS 4.1. Some reports have suggested that errant processes are running in the background constantly and draining the battery power. Bugs in the modem firmware, tethering software, and Game Center have all been cited as possible causes of the issue.

Downgrade iPhone iOS 4.1 to iOS 4.0.1 / 4.0.0 / 3.1.3

Sometimes for whatever reason an iPhone firmware upgrade ends up being counterproductive or causes issues with your individual phone. Maybe you're experiencing battery life problems with iOS 4.1 on your iPhone 3GS. Updates can even happen by accident with the wrong click of a button, wiping a jailbroken device.

If you have already saved your SHSH files for one or more earlier firmware versions on Saurik's server, you can follow these steps to downgrade from iOS 4.1.

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