Jailbreak iPhone OS 4.0 Beta 4 with Redsn0w 0.9.5b4

Jailbreak iPhone OS 4.0 Beta 4 with Redsn0w 0.9.5b4

Redsn0w 0.9.5 beta 4 is out now to jailbreak iPhone OS 4.0 beta 4 firmware. The iPhone Dev-Team has released redsn0w 0.9.5b4 to jailbreak iPhone OS 4.0 so that the developers of  jailbreak apps can fix the issues with their apps and get them ready before the availability of iPhone OS 4.0. So, Redsn0w 0.9.5b4 is meant for developers only NOT for end users.

redsn0wPlease note that Redsn0w 0.9.5 beta 4 is a Jailbreak tool NOT an unlock. iPhone OS 4.0 beta 4 contains a Baseband update which is not unlockable ATM.


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.

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.

YOU SHOULD STAY CLEAR OF THIS BETA SOFTWARE IF YOU RELY ON A CARRIER UNLOCK. That’s because the beta redsn0w works only if your device has already been upgraded to the stock 4.0beta1/beta4 IPSW from Apple, which contains a baseband update. If you installed that IPSW, you’ve already lost the carrier unlock until the next planned release of ultrasn0w and blacksn0w.

Redsn0w 0.9.5b4 Supports:

  • iPhone 3G only (for now)
  • Mac OSX only (for now)
  • the 4.0beta1/beta4 FW only (for now)

You can download Redsn0w 0.9.5b4 from the link below. Steps to jailbreak iPhone 4.0 beta 4 firmware are similar to that posted here.

Download Redsn0w 0.9.5b4

You can download Redsn0w 0.9.5b4 from here.

Download iPhone OS 4.0 Beta 4

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You may also be interested in:

Update 1: Jailbreak iPhone 3G iOS 4 with RedSn0w

Update 2: Jailbreak iPod Touch 2G iOS 4 with RedSn0w

Update 3: Jailbreak iPhone 4 [Coming Soon]

16 comments… add one
KING Ayub May 27, 2010, 6:34 am

hello how are you?

my question is where i download 4.0 Firmware Version??

Amin12307 June 9, 2010, 1:48 am


esh May 27, 2010, 11:26 pm

when you guys going to realease a unlock for 3gs 32gb iphone 05.12.01.
my iphone shows usb cable connected with itunes in home screen after i updated a new version 3.1.3 from itunes. i dont have any idea.. is there any solution to access a home screen. i just want to use my iphone as a ipod.. thanks

Vicoy May 29, 2010, 10:27 am

Is there any unlock coming out for iphone 3gs 3.1.3 baseband 5.12.01?reply pls?

iPhoneHeat May 30, 2010, 3:29 pm

with the release of next iPhone 🙂

vesh May 30, 2010, 3:56 pm

i hope so becoz i m also waiting for my phone to unlock

juju November 15, 2011, 5:15 am

est ce que c’est normal que je peux pas rejailbreak mon iphone 3G j’ai un message qui me marque unable to recognize specified
IPSW g besoin d’aide

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