As you can see in the demo video below, the jailbreak package promises to bring “biometric facial recognition security” to the iPhone 4. This means that users will be able to configure the handset to scan their own face in order to unlock the iPhone. Furthermore, it will be possible to adjust exactly “how sure” you want the app to be, in order to go ahead with the unlock (this ranges from “Not Secure” to “Very Secure”).

RecognizeMe is now available in Cydia for download for $6.99 via the BigBoss repository.

Gevey SIM for iPhone 4 basically works by forcing the activation of the baseband using the emergency dialer, and it is also said to be vulnerable up to iOS 4.3. It is advised that you wait for a legal iPhone 4 unlock from the iPhone Dev Team which will be possible soon thanks to the 40-bit NCK exploit for iPhone 4.

Official iPhone unlock statement: no unlock will be released until after 4.2.5 or official 4.3 (whichever is last) is out

Because there’s no 4.3 beta for iPhone3G, it’s effectively unlocked for life via the 06.15 ultrasn0w unlock

Sherif Hashim found an exploitable baseband crash that could bring an unlock for basebands 05.14.02 and 02.10.04 back in November. Very little has been heard since then, and nothing definitive as to the timing on a new ultrasn0w for iOS 4.1 and 4.2. One impatient unlocker sent Hashim  a tweet in Arabic, saying he was going away for military service on January 16 and asking if the unlock would be ready by then. Hashim’s  response, in English: “sure.”

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).

WARNING — YOU DO THIS AT YOUR OWN RISK!  PLEASE UNDERSTAND THE CONSEQUENCES OF UPDATING TO 06.15. READ MORE!

You will need :

Download iOS 4.2.1 for iPhone, iPod touch and iPad
Download Redsn0w 0.9.6b5 for Windows
Download Redsn0w 0.9.6b5 for Mac
Download iTunes 10.1 for Windows or Mac

Here’s the step by step guide :

STEP 1: Download redsn0w 0.9.6b5,  iOS 4.2.1 for your device(download links at the end).

STEP 2: Update to 4.2.1 firmware using the IPSW file you just downloaded via iTunes 10.1.

STEP 3: Launch Redsn0w 0.9.6b5,  and browse for iOS 4.2.1 firmware final version.

STEP 4: Now you have to select “Install Cydia” and “Install iPad baseband”, and then click “Next” (in this step redsn0w will update your baseband to 06.15.00 which works with ultrasn0w 1.2)

STEP 5: Now make sure your device is both OFF and PLUGGED IN to the computer before you click “Next”.

STEP 6: At this stage you will need to put your iPhone in DFU mode by holding “Power” button and then while holding the “Power” button, you will now have to hold “Home” button too. Now after few seconds release “Power” button but keep holding “Home” button until installation begins.

STEP 7: You will Get a Jailbroken Device on the latest iOS 4.2.1  and the unlockable baseband 06.15.00

STEP 8: This step is only for these devices iPhone 4, 3GS (New Bootrom), iPod touch 4G,  3G, 2G, iPad. While this is tethered jailbreak and whenever you want to do anything related to jailbreak like SSH your device, or running Cydia, you must first run your device in the so called “jailbroken state” on every reboot by using “Just boot tethered right now” option.

How to unlock iPhone 3GS / 3G on iOS 4.2.1 / 4.1 using ultrasn0w 1.2 :
This is the final step to get your device unlocked on iOS 4.2.1 / 4.1 with the newly release ultrasn0w 1.2, follow our full step by step guide Posted Here.

Simply follow the simply step by step guide posted below for unlocking iPhone 3G and iPhone 3GS on 4.2.1 firmware using.

Step 1: First follow the complete step by step guide posted here to jailbreak iPhone 3GS or iPhone 3G on iOS 4.1/4.2.1 firmware.

Step 2: Once your iPhone is jailbroken, start “Cydia” on your iPhone and touch on “Manage” tab on the bottom. Now touch on “Sources”.

Note: T-Mobile users should disable 3G before installing ultrasn0w.

Step 3: Touch on “Edit” and then on “Add”. You will be prompted to enter a url source as seen in the screenshot below. Type “http://repo666.ultrasn0w.com” and touch on “Add Source”.

Step 4: Once the repository has been added successfully, Search for “ultrasn0w” in Cydia and install this application. The latest version 1.2 of this app will automatically unlock your iPhoneso that you can use it with any carrier with proper carrier name/logo.

Step 5: Now simply restart your iPhone. Voila! You should now have a fully unlocked iPhone 3G/3GS on firmware 4.1/4.2.1.

STEP 1: Download PwnageTool 4.1.3 unlock edition from here.

STEP 2: Download iOS 4.2.1 for your device and also catch iOS 3.2.2 from here before it’s removed (required to update the baseband). Then copy all the files to your desktop.

STEP 3: Now launch PwnageTool and select iPhone 3GS / 3G and point it to the original iOS 4.2.1 firmware you downloaded.

STEP 4: You’ll now be asked if you want to update your baseband to the 06.15 version. If you are on 05.14 or 05.15 or higher you will need to do this to unlock. You do not need to do this for jailbreak only. Click on YES and then select Browse for IPSW and point it to iOS 3.2.2 you downloaded.

STEP 5: You’ll have to choose some options as installing Cydia packages, custom logos and packages. Finally, hit the blue the build button.

STEP 6: You’ll be asked to save the cooked firmware. Please allow up to 10 minutes.

STEP 7: When prompted if your iPhone has been Pwned before, we clicked No. It allows for a more thorough restore. Once done, follow the instructions seen on the screen to enter into DFU mode

STEP 8: Now, You will have to restore your iPhone to the jailbroken custom firmware by Clicking on the iPhone icon on the left sidebar of iTunes then hold left “alt” button (“Shift” button on Windows) on the keyboard and then click on “Restore” then release the alt button, Now Select the custom firmware created by PwnageTool and Let iTunes go in a bunch of steps.

STEP 9: Almost done, you can now unlock your iPhone 3GS / 3G by following my previous guide posted here.

@mfaizulislam just the opposite @sherif_hashim has provided very nice crashes for i4 BB, which we can explore more starting Monday

Here is a screenshot of the tweet :

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