Sunday, November 28, 2010

Guide: Jailbreak and Unlock iOS 4.2.1/iOS 4.1 with Redsn0w 0.9.6.b5 [How to]

DEV-Team has Updated Redsn0w to version 0.9.6b5 which will allow iPhone 3GS and iPhone 3G Users to Jailbreak their Device on iOS 4.2.1 and also Update their respective baseband to 06.15.00. Here we have a complete step by step guide on How to Jailbreak your Device, and in order to Unlock you have to Update your Baseband to 06.15. This Guide is both for MAC And Windows.If you have an old-bootrom 3GS and are already unlockable but want to get to 4.2.1, please wait til iPhone Dev Team release an “unofficial” bundle for you.

Dev-Team has updated in their Blog that:

The new redsn0w 0.9.6beta5 is out.  It gives both Windows and OSX users the ability to flash the iPad 06.15 baseband on iPhone3G or iPhone3GS.  It fetches the baseband files directly from Apple for now (the only IPSW you ever point it at is the stock IPSW for the FW on your iPhone right now).  There may be a long delay while it’s doing this (their servers are currently getting pounded).
Important Note: RedSn0w not only jailbreak your iOS 4.2.1 but it also updates the baseband 5.14.02 and 5.15 to 6.15 for iPhone 3GS and 3G so make it unlock. Now there are some key points which should be note before proceeding with this Jailbreak and unlock tool.
1. There is no way to come back down from 06.15, and there’s no hiding the baseband version from Apple. You’ll be voiding your warranty in a very obvious way.

2. If some future baseband comes out with a critical fix, you won’t be able to update to it if it remains down in the 05.xx sequence (then again, you wouldn’t update to it if you wanted to keep your unlock anyway).
3. Starting with FW 4.2.1 if you have 06.15 on your iPhone you won’t ever be able to restore to stock firmware (it will fail). You’ll need to only restore to custom IPSWs (then again, if you’re unlocker you should already be doing that).

Don’t update to 06.15 if you don’t need to! Only do this if you need the unlock and you’re stuck on 05.14 or 05.15, and you’re willing to assume the above risks.
So here is the Guide,
First of all Download the Following:
 iOS 4.2.1 Firmware for your Device [Download Link]
Redsn0w 0.9.6.b5 for Windows [Download Link]
Redsn0w 0.9.6.b5 for MAC [Download Link]

Step 1: Update and restore your iPhone firmware to iOS 4.2.1 using iTunes 10.1. Open iTunes and select your iPhone in sidebar, Windows users press “shift” and restore and browse the firmware. Mac users press “Alt/Option” and Restore and browse to iOS 4.2.1 firmware.

Step 2:Launch RedSn0w 0.9.6B5 and “Borwse” your iOS 4.2.1 Firmware.

Step 3: Now you'll be Given different options to choose from, Select “install Cydia” and “install iPad Baseband”,So iPad Baseband 06.15 will be ported to iPhone 3Gs and 3G and will make it ready for unlock. Don’t select custom boot logo and recovery logo if you don’t want to.

Step 4: Now you have to make sure that your Device is Turned Off and connected to your Computer.

Step 5:Now you have to Put your Device into DFU Mode,Just follow the Instruction shown in image and you can put your Device into DFU Mode.

Step 6: After your Device has entered to DFU Mode,your installation of custom firmware with baseband 06.15 will start.
NOTE: If you have problems with RedSn0w on Windows Vista or Windows 7. Right click the executable and set it to run as administrator in Windows XP compatibility mode.
Here you are done with Jailbreak, your Device has been Jailbroken!

How to Unlock:
Read the following before you unlock your Device.

Step 7: Now if you want to Unlock your Device then Simply Follow this Guide.

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