How to Unlock iPhone 3G(S) on iOS 4.2.1 with Ultrasn0w and Redsn0w [Guide]

As promised in our previous post, here is the step by step guide to unlock iOS 4.2.1 on iPhone 3G, 3GS using Reds0w and Ultrasn0w.

First we will update the baseband to iPad 06.15 and jailbreak the iPhone with Redsn0w. After the device is jailbroken, we can use Ultrasn0w from Cydia to unlock the device. Find the complete guide after the break.

Please read these instructions and warnings before you start the actual process:

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).

Step 1: Download iOS 4.2.1 for your idevice.

Step 2: Download iTunes 10.1 and install it on your PC.

Step 3: Back up all the contents on your phone before you start the actual jailbreak process.

Step 4: Save the SHSH blobs if you are still on iOS 4.1 or below version. !very important

Step 5: Update/restore your device to iOS 4.2.1 via iTunes.

Step 6: Download Redsnow 0.9.6 beta 4 and run it.

Step 7. When asked for iOS firmware, point the redsn0w to iOS 4.2.1 downloaded in first step.

How to Unlock iPhone 3G(S) on iOS 4.2.1 with Ultrasn0w and Redsn0w [Guide] redsn0w ultrasn0w 2

When you receive a pop-up message, click on Yes to confirm the baseband change.

How to Unlock iPhone 3G(S) on iOS 4.2.1 with Ultrasn0w and Redsn0w [Guide] redsn0w ultrasn0w 1

Step 8: Click on next and select “Install Cydia” and “Install iPad Baseband” options. Optionally you can also select any other option available for your idevice.

How to Unlock iPhone 3G(S) on iOS 4.2.1 with Ultrasn0w and Redsn0w [Guide] unlock redsnow1

Step 9: At this step make sure that your phone is switched off and plugged into the computer. Follow the onscreen instructions to put the idevice into DFU mode.

Step 10: Let Redsn0w do its work. Once completed your phone will restart and you will find it jailbroken on iOS 4.2.1.

Now if you have iPhone 3GS New bootrom you will have to connect it with Resnow and select the “Just boot tethered right now” option to get the jailbreaked state on every boot.

How to Unlock iPhone 3G(S) on iOS 4.2.1 with Ultrasn0w and Redsn0w [Guide] RedSn0w Boot Tether

Downloads:

* Download iOS 4.2.1 for your idevice
* Download iTunes 10.1 for Win and Mac OS X
* Download Redsn0w 0.9.6 beta 5 for Win and Mac

Note: Windows 7 or Vista users often need to use XP or 98 compatibility modes when launching redsn0w (right-click).

How to Unlock with Ultrasn0w 2.1:

After your device is jailbroken using the above mentioned procedure, open the Cydia App and search for Ultrasn0w. Install it and reboot your device. Your device is now unlocked.

Disclaimer: This guide is for educational and testing purpose only. This site will not be responsible for any type of damage. Use it at your own risk.

How to Bypass Errors Such As 14, 3194 While Restoring iOS 4.2.1 on iPhone 3GS, 3G and iPod Touch

Today it’s fourth iPhone which I updated to iOS 4.2.1, jailbreaked and unlocked with Ultrasn0w. Please don’t assume that I do all this jailbreaking and unlocking stuff for business. In fact, thinking me an iPhone Guru, every day one or two friends of mine came here at my place to get their iPhones unlocked on iOS 4.2.1.
Initially I experienced many problems, but the one which was very irritating to me was:

  • iTunes unbearable errors like 14, 3194, 1600 etc
After using different types of tips, tricks and softwares I have got sort of mastery to bypass and resolve these error and I thought that I should share my experience with the readers of this blog.
How to Bypass Errors 14, 3194, 1600 etc?
These are very common errors which you may face during RESTORE process. The one and only solution to bypass such errors is, at least which worked for me, to use a pwned DFU mode. There are three softwares available for this purpose:
How to Bypass Errors Such As 14, 3194 While Restoring iOS 4.2.1 on iPhone 3GS, 3G and iPod Touch redsn0w
Being a windows users I don’t know much about PwnageTool and how well it performs to bypass these errors but in the remaining two softwares iREB is my favourite now.
I tried Redsnow many times but it didn’t work for me and whenever I used iREB, I got success. Here is how to use iREB to get the PWNED DFU mode:
How to Bypass Errors Such As 14, 3194 While Restoring iOS 4.2.1 on iPhone 3GS, 3G and iPod Touch ireb
  • Download iREB for windows here. Though it supports up to iOS 4.1 but it also works on latest iOS 4.2.1 too, at least for me.
  • Close iTunes.
  • ‘Connect your iPhone with PC after switching it off.
  • Launch iREB.
  • Select your device on the screen of iREB UI and follow the onscreen instructions.
  • If you get DFU mode, the screen of your idevice must be blank (black).
  • Now use iTunes to restore iOS 4.2.1 on your iPhone without any error.
Sometimes your idevice may stick into the recovery mode. Here is the solution to get rid of this problem.
  • Connect your iPhone stuck in Recovery Mode or at Apple Logo with PC.
  • Lauch iREB.
  • Select the device on the screen of iREB. ( Its important before you follow next step.)
  • Now keep pressed both Home and Power buttons to turn the device off.
  • As the device turns off (black screen), release Home button, but never release Power button.
  • As soon as Apple logo re-appears, press the Home button again.
  • The screen will go black again after 5-6 seconds. But don’t release any button (Home + Power) till next 5 seconds.
  • After 5 seconds, release the Power button but keep pressed Home button until iREB recognises the DFU mode.
  • iREB will put the device into limera1ned DFU mode.
If you don’t get the DFU mode, retry again and again. After few attempts you will succeed. Now launch iTunes and restore the stock or custom iOS 4.2.1 on your iPhone 3GS, 3G, iPod Touch, or Apple TV to jailbreak or unlock it.
If you still get any error during the restore process, restart your PC and try different USB port. If you are using the front-side, use the rear one and if on left side, use the one at right side, according to your PC.
  After using all the tricks mentioned above, I am still getting errors.
  Use another PC then.

ultrasn0w 1.3 to unlock baseband 02.10.04

ultrasn0w 1.3 to unlock baseband 02.10.04
go to cydia and add this source:http://cy.itmfr.net/assanovic/
and install ultrasn0w1.3
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