Other ways to unlock/jailbreak iPhone 3G firmware 3.1.3 baseband 05.12.01 Bootloader 5.8

In Apple device on 03/05/2010 at 2:51 AM


  • Bad news folks, some of the guys pointed out this iPhone has bootloader 5.8. That is why this method worked 😦
  • So to make sure you can UNLOCK the device, you need to download “f0recast” software from
  • Run this software, it will tell if you are able to downgrade your baseband and unlock !
  • If yes, run Cydia and search for “Fuzzyband Downgrader”Β  install and run. And Then let it Sn0w !


Yes you read it right, folks ! I am able to install blackrain into my friend iPhone 3G firmware 3.1.3 baseband 05.12.01 sucessfully. And after having blackra1n appear in my friend home screen, the rest is just deadly simple: install Cydia and Unlock phone are 2 fingers away πŸ™‚ The phone specs before the unlock is: Firmware 3.1.3 (Update through iTunes) baseband: 05.12.01 and after the unlock: Firmware 3.1.2 (7D11) baseband: 05.12.01

How can i do it ?

I guess it was my lucky day πŸ™‚ You will need:

  1. iPhone 3G firmware 3.1.2
  2. Blackra1n from Geohotz website
  3. Patience and time cuz you will need to restore the device 3 or 4 times

Ok enough typing here they are:

  1. Connect your phone to iTunes and do normally downgrade to firmware 3.1.2 (Shift click restore)
  2. Ok and when you nearly finish, iTunes will display some stupid errors: 16xx or 2…. It is normal !
  3. Now your iPhone should stuck in Recovery mode like this picture:
  4. iPhone recover mode
  5. That is a good sign. Now next is very long process: What i basically do is run Blackra1n again and again until you can see GeoHotz picture appear in your screen. And then your iphone will have his wonderful application ! Remember that if the iPhone appears black screen for 10mins after you press Make It Ra1n, just reboot it by holding the 2 buttons and run blackra1n again !
  6. Based on my friend phone, it normally took me about 2 times to get GeoHotz screen.( I did the downgrade process 5,6 times to make sure and they were all sucess πŸ™‚ It seems to me that Apple fix is not good enough to 100% block GeoHotz exploit

I did it. How about yours?

  1. I need someone to confirm that this method work on every iPhone accidentally upgrade to 3.1.3. So please if you are successful please post your result
  2. Also i want to confirm that the solder joint i did to my friend’s phone has nothing to do with this downgrade. (My skill at solder is terrible so i am not willingly unsolder and solder the joint myself 😦
  1. What about Iphone 3gs with 3.1.3 BB 5.12.01?

    • Well i don’t have iPhone 3GS to test right now so i am not sure if this method should work on Iphone 3gs with 3.1.3 BB 5.12.01 or not
      However owners of 3GS are welcome to try as there are nothing to lose in here except 2 hours experiment πŸ™‚

  2. Lets try it then

  3. doesn’t work. can jailbreak it but no unlock? am i missing any steps?

    • Hi there,
      I am afraid that this iPhone is in 5.8 boot loader that is why it worked
      You can download “f0recast” software in Snowbreeze website to determine whenever your iPhone can be unlocked or not

      Sorry about that
      Fault alarm 😦

  4. What is the phone’s bootloader? If it’s 5.08 well I guess that’s the reason why it worked. But if it’s 5.09 or higher then you must have stumbled upon something good.

  5. to avoid error 16xxx, run ireb before restore. i never got any errors after ma run ko ireb.

    • Thanks Nas, you added good point there πŸ™‚ I will post other guide for this !
      The problem is i could not get “ireb” to work with this iPhone. The fact is i never see the magical white screen appeared 😦 I tried different suggestions from snowbreeze forum but no use that is why i come up with this method
      Glad you mention it !

  6. This works on baseband 5.12 too. Thanks bro. Very much THANKS
    It wont unlock but it will let you downrade

  7. ey… im from the philippines and my iphone says no service. i updated it to 3.1 something. please help…

    • i have an iphone 3gs

      • Hi emy πŸ™‚
        Thanks for reading my blog. Please give me some more details so i can help you !
        You can find them in Settings->General->About-> Your Version and Modem Firmware:-)
        And also i need you to download and run Forecast (link in my post) and copy back for me your bootloader and its comment

  8. it worked in the first attempt

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