HOW TO DOWNGRADE IPHONE 3G 4.0 FIRMWARE TO 3.1.2 FIRMWARE AND UNLOCK



Hey in this tutorial I’ll be showing you how to downgrade the iphone 3g 4.0 OS Firmware to 3.1.2 firmware. I’ll also show you how to unlock your phone. 😉

Download iPhone Firmware:
http://www.felixbruns.de/iPod/firmware/

Download Blackra1n:
http://www.blackra1n.com

Ultrasn0w Source for Unlocking iPhone:
repo666.ultrasn0w.com
(Remember that the “0” in snow, is a zero, not a letter.)

Keep in mind, your doing this on your own risk. I AM NOT Responsible for any mistakes that you do during this process. If you follow what I did correctly, you shouldn’t have any problems. Thanks for watching! .

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17 Comments

  1. Hi,

    Awesome video!
    Just wanted to confirm, can I use it for iPhone 3G with below details
    Version – 4.0
    Firmware or Baseband – 05.13.04

    Which one is better – 3.1.2 or 3.1.3 ?

    Thanks.

  2. iv opened cydia and did what you said, but when i open it now it just keeps saying loading data… then goes off … what should i do? please help asap

  3. DUDE!!!!!!! THANK YOU SOOOOO SOOOO SOOOO MUCH!!! I WAS STUCK ON THIS FROM LIKE 5 DAYS! THX THX THX THX THX THX!!!!!!!!!!!GOD BLESS U! 😀

  4. Thanks a million!! it really worked!! i dont have wifi network available in my area, how do i unlock it?

  5. ok i got a bunch of files when i downloaded the firmware, i didnt get a box like you did wtf do i do????

  6. thank u so much man i followed ur step by step and it worked fine and it was easy thanks

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