3G FuzzyBand Downgrader is a safer iPhone 3G  Baseband Downgrader as this one detects your baseband and bootloader version and does the wright thing first. More general 3G Fuzzyband Downgrader detects your bootloader and baseband and downgrade it with a simple click. Fuzzyband  will downgrade any baseband from 2.30 to 4.26.08 (beta 5). This wonderful GUI Baseband Downgrader was created by w1kedZ (coding) & DHowett (GUI). It is based on the exploit in the 5.08 bootloader found by geohotz. So yes you must have the 5.08 bootloader for this to work. The beautiful part about this tool is that it will check your bootloader for you. The 3G Fuzzyband Downgrade just works on iPhones 3Gwith Bootloader 5.8 if you are on bootloader 5.9 this tool will not work on your iPhone. 3G Fuzzyband Downgrader available in ICY and Cydia just refresh your sources and search n install the application.  We already published manual quickworks for Downgrading your baseband from 4.26 to 2.28 and 4.26 to 4.22 check here. Another guide will show you how to downgrade from baseband 02.30.03 to 02.28.00 with 3G Baseband Downgrade check here.

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StealthBravo Moderator at MMI posted a most awaited downgrade guide for the peoples who accidently upgrades their iPhone 3G to OS 3.0 The exploit is based on same as GeoHot discovered to downgrade from 02.30.03 to 02.28.00 . The 3G Baseband Downgrade just works on iPhones 3G with Bootloader 5.8 remember you have bootloader 5.8 not 5.9. You can check your bootloader by following this guide here. StealthBravo developed two BB Downgrade patches named “StealthBravoBBDowngrade“. First patch is developed for downgrading baseband from 4.26 to 2.28 and Second one is developed for downgrading baseband from 4.26 to 4.22 StealthBravo Also posted step by step guide which are given below. First Guide explains how to downgrade baseband from 4.26 to 2.28 so that you can unlock your iPhone 3G 2.2.1 again with Yellowsn0w 0.9.8 and the second guide is for the peoples who are using Sim Adapter Cloning to unlock the iPhone OS 3.0 beta as the beta 4 upgrades your baseband to 4.26 and most of Sim Clones works up to Baseband 4.24 so we have another guide To Downgrade your baseband from 4.26 to 4.22:

To Downgrade your baseband from 4.26 to 2.28:

1. Make sure you are running firmware 2.2.1 and jailbroken with OpenSSH installed.

 

2. Launch Cydia or Icy and Install 3G Baseband Downgrade (BigBoss Repo)

3. Download the BB Downgrade Patch: StealthBravoBBDowngrade

4. Copy the fls and eep file from 4.26 folder in the Downloaded BB Patch into /Applications/3GBBD on the phone. Overwrite the current files

5. On the phone run 3GBBD on the springboard and hit go

6. This will take a minute or two

7. When complete it should give you a green screen that says successful

8. DO NOT CLICK GO AGAIN!

9. Press the home button and then reboot your phone

10. When your phone comes back, Goto settings -> general -> about and verify you are on 2.28
You now can now run yellowsnow to unlock your phone again.

To Downgrade your baseband from 4.26 to 4.22:

1. Make sure you are running firmware 3.0 and jailbroken with OpenSSH installed.

2. Launch Icy and Install 3G Baseband Downgrade (BigBoss Repo)

3. Download the BB Downgrade Patch: StealthBravoBBDowngrade

4. Copy the BBUpdaterExtreme into /Applications/3GBBD on the phone. Overwrite the current file

5. Check the permissions for BBUpdaterExtreme and make sure they are set to 777

6. Copy the fls and eep file from 4.26 folder in the Downloaded BB Patch into /Applications/3GBBD on the

phone. Overwrite the current files

7. On the phone run 3GBBD on the springboard and hit go

8. This will take a minute or two

9. When complete it should give you a green screen that says successful

10. DO NOT CLICK GO AGAIN!

11. Press the home button and then reboot your phone

12. When your phone comes back, Goto settings -> general -> about and verify you are on 2.28

13. Copy the fls and eep file from 4.22 folder in the Downloaded BB Patch into /Applications/3GBBD on the phone. Overwrite the current files

14. On the phone run 3GBBD on the springboard and hit go

15. This will take a minute or two

16. When complete it should give you a green screen that says successful

17. DO NOT CLICK GO AGAIN!

18. Press the home button and then reboot your phone

19. When your phone comes back, Goto settings -> general -> about and verify you are on 4.22

20. You can now insert your sim adapter into your phone and you should have service!

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