How to Downgrade Your iPhone 3G Baseband Using Fuzzyband

Posted May 24, 2009 at 8:22pm by iClarified | Please help us and submit a translation by clicking here | 143581 views
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These are instructions on how to downgrade your baseband to 2.28 for iPhone 3Gs with the 5.8 bootloader using Fuzzyband. This will allow you to unlock your iPhone 3G using YellowSn0w.

Fuzzyband is the preferred application for downgrading your baseband since it does version checking, downgrades all versions of baseband from 2.30.03 to 4.26.08 (3.0 beta5), and it reports the current bootloader version on screen.

Step One
Press to launch Cydia from your SpringBoard.


Step Two
Press to select the Sections tab at the bottom of the screen.


Step Three
Press to select System from the list of sections


Step Four
Press to select 3G Fuzzyband Downgrader from the list of packages


Step Five
Press the Install button at the top right of the screen.


Step Six
Press the Confirm button at the top right of the screen to begin installation.


Step Seven
Once installation has completed successfully press the large Return to Cydia button.


Step Eight
Press the Home button to return to your SpringBoard. Notice there is a new application icon titled Fuzzyband. Press to launch the application.


Step Nine
Immediately upon launching the application you will be shown a message stating that Fuzzyband is querying your modem.


Once it completes you will be displayed your Bootloader Version, your Baseband Version and your iPhone OS version.

If you have a bootloader version higher then 5.08 you will not be able to downgrade your baseband and a Not Supported message will be displayed.


If you have the 5.08 bootloader you will be able to downgrade from baseband 2.30 or higher. Press the Downgrade button to begin downgrading your baseband.


Step Ten
Once the downgrade has completed successfully you will be displayed a Done! message saying, "I Haz Downgrade!" and you will be on the 2.28 baseband.



***THANKS: to w1kedZ/DHowett for creating this utility

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wiiguy28 - November 7, 2010 at 2:59pm
can I update my iphone 3g /3.1.2/ 5.11.07 to a later version and still keep my jailbreak and unlock?????please , thank you
Jay - March 12, 2010 at 7:26pm
Hi, I have a 3g iphone with bootloader 06.2[g2m3s2] and base band ICE2-05.12.01 version 3.1.3 how can i downgrade it?
amyl56 - February 11, 2010 at 11:33am
My Cydia doesn\'t have Fuzzyband what should I do?
kylie - March 1, 2010 at 9:15am
Go into Cydia>changes>reload Cydia should update and Fuzzyband should be availible
amyl56 - March 5, 2010 at 10:54am
Is it nessesary to have wi-fi service in order to access Cydia?
amyl56 - March 5, 2010 at 10:56am
When I get to changes it is blank.
Shashi - October 1, 2009 at 6:37am
Please let me know if we can degrade the baseband version with bootloader version 05.09 or how do we degrade the bootloader version to 05.08. Please help me !!!!!!!! email - shashi.net@gmail.com
vinod - December 30, 2009 at 6:37pm
Hi, Can any one tell me my wifi is not working so how do i download fuzzy band and downgrade the baseband. please help.
Ricky Yu - February 18, 2010 at 11:23am
You cannot downgrade bootloader. Read http://blog.iphone-dev.org/
Bilal - June 14, 2009 at 2:57am
Dev Team is so silent i think they r not intresting to unlock bootloader 05.09 Dev team atlest reply onece.... Love you
Osayi - June 14, 2009 at 6:01pm
This is iClarified.com. Dev-Team is at blog.dev-team.org.
Shashi - October 1, 2009 at 6:35am
Please let me know if we can degrade the baseband version with bootloader version 05.09 or how do we degrade the bootloader version to 05.08. Please help me !!!!!!!! email - shashi.net@gmail.com
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