Jailbreak for iPhone OS 4.0 Released! Developers Only! [UPDATE]

The iPhone Dev Team are the first out of the gate, to release a jailbreak tool for iPhone OS 4.0. MuscleNerd announced, on Twitter, that they have released redsn0w 0.9.5, for Mac. Redsn0w 0.9.5 supports iPhone 3G, on iPhone OS 4.0. This is for developers only, though, as you still need to have your iPhone 3G’s UDID  properly registered with a Apple Developer account. This is basically a pre-release, so that devs can get their jailbroken apps ready for the official OS 4.0 release.

The Dev Team warns that the normal user should stay away from this, as there is not a lot of jailbreak apps that work with OS 4.0. Also, your baseband will be upgraded to 05.13, cannot be unlocked, and cannot be downgraded. YE BE WARNED!!

Here’s some details, from the iPhone Dev Team:

This is a beta release of redsn0w targeted at developers of jailbroken apps. It uses the same pwnage2 DFU-mode exploit that we’ve been using since the 2.x days. Nothing new is revealed to Apple, and it’s not applicable to the iPad. Don’t go near it if you use yellowsn0w, ultrasn0w, or blacksn0w.

Please not that this beta is not meant for the average end-user. There are many things “broken” with jailbroken apps in the 4.0beta1 environment right now (that’s the real reason we showed “Veency” in the 4.0 jailbreak demo video last week, instead of say MobileTerminal.app, which is broken!). This beta redsn0w allows the developers behind those jailbroken apps (like MobileTerminal.app!) to fix their software before the general public gets iphoneOS 4.0.

Because it’s meant for JB app developers, this beta redsn0w does not perform hactivation. You’ll need a properly-registered developer UDID with Apple to get past the activation screen. For similar reasons, there is no Windows version of this beta redsn0w (since apps are developed on MacOSX). Please don’t pirate Apple software.

Anyone other than developers of jailbroken apps porting their software to 4.0beta1 should still be using our previously-released redsn0ws for 3.0 through 3.1.3

For full details of this release, go here.

UPDATE: Apparently, some developers have had issues with SMS and data reception, after using redsn0w 0.9.5 beta 1. Well, the iPhone Dev Team have responded, and released redsn0w 0.9.5 beta2. If you’re a developer, download it here. You’ll have to do a fresh restore to OS 4.0, before using this update.

For more jailbreak news, and iPhone ramblings in general, follow me on Twitter: @rorypiper

  • AMAZING!

    Now they just need it for the 3GS and I can finally hack my 4.0!

  • Whoa! Looks like 4.0 Cydia devs are gonna get hard at work! Thanks Dev Team!

  • carabasse

    Good to hear, but for now , there is a good bunch of people who are stuck with 3GS 3.1.3 and I don't understand the hold up, since it looks like there is a multitude of exploits, at least the DEv-team/Geohot should release one fix for 3.1.3 3GS. what's the use of the iphone if it spends over a quarter on the shelf ? better start looking into other better alternatives

  • rorypiper

    From what I hear, the hold up is just the 3G iPad. The next tools will jailbreak the iPad, as well as all other devices on 3.1.3, untethered. They just want to make sure the tools work cross platform. So, maybe end of May, and everyting will be jailbroken!

  • carabasse

    Good to hear, but for now , there is a good bunch of people who are stuck with 3GS 3.1.3 and I don't understand the hold up, since it looks like there is a multitude of exploits, at least the DEv-team/Geohot should release one fix for 3.1.3 3GS. what's the use of the iphone if it spends over a quarter on the shelf ? better start looking into other better alternatives

  • rorypiper

    From what I hear, the hold up is just the 3G iPad. The next tools will jailbreak the iPad, as well as all other devices on 3.1.3, untethered. They just want to make sure the tools work cross platform. So, maybe end of May, and everyting will be jailbroken!