April 13, 2024

How to Downgrade Your iPhone 3G 2.30 (2.2.1) Baseband for Unlock

Posted April 16, 2009 at 1:52pm by iClarified
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****THIS TUTORIAL HAS BEEN RETIRED IN FAVOUR OF THE NEW FUZZYBAND DOWNGRADER. YOU CAN FIND INSTRUCTIONS ON HOW TO USE FUZZYBAND HERE****

These are instructions on how to downgrade your baseband from 2.30 to 2.28 for iPhone 3Gs with the 5.8 bootloader. This will allow you to unlock your iPhone 3G using YellowSn0w. An similar exploit is still be worked on for those with a higher bootloader version...

IMPORTANT: Make sure your iPhone uses the 5.8 bootloader before continuing. You can find instructions on how to check your bootloader version here: Windows, Mac. Ensure you are on the 2.30 baseband by following this tutorial. You will also need MobileTerminal installed to completed this tutorial.



Step One
Launch Cydia by pressings its icon on your SpringBoard.
How to Downgrade Your iPhone 3G 2.30 (2.2.1) Baseband for Unlock

Step Two
Press to select the Sections tab at the bottom of the screen.
How to Downgrade Your iPhone 3G 2.30 (2.2.1) Baseband for Unlock

Step Three
Press to select iClarifed from the list of Sections. If you don't see iClarified you will need to add the iClarified source using these instructions.
How to Downgrade Your iPhone 3G 2.30 (2.2.1) Baseband for Unlock

Step Four
Press to select DownBB from the list of Packages.
How to Downgrade Your iPhone 3G 2.30 (2.2.1) Baseband for Unlock

Step Five
Press the Install button at the top right of the screen.
How to Downgrade Your iPhone 3G 2.30 (2.2.1) Baseband for Unlock

Step Six
Press the Confirm button to begin installation.
How to Downgrade Your iPhone 3G 2.30 (2.2.1) Baseband for Unlock

Step Seven
Once installation has completed successfully press the large Return to Cydia button.
How to Downgrade Your iPhone 3G 2.30 (2.2.1) Baseband for Unlock

Step Eight
Press the Home button to return to your SpringBoard then press to launch Terminal
How to Downgrade Your iPhone 3G 2.30 (2.2.1) Baseband for Unlock

Step Nine
Enter su into the terminal window then enter alpine when prompted for a password.
How to Downgrade Your iPhone 3G 2.30 (2.2.1) Baseband for Unlock How to Downgrade Your iPhone 3G 2.30 (2.2.1) Baseband for Unlock

Step Ten
Enter DownBB into the terminal window to launch the baseband downgrade script.
How to Downgrade Your iPhone 3G 2.30 (2.2.1) Baseband for Unlock

Step Eleven
You will be asked to confirm you would like to continue. Please make sure you are on the 2.30 baseband and have the 5.8 bootloader before entering yes into the window.
How to Downgrade Your iPhone 3G 2.30 (2.2.1) Baseband for Unlock

Step Twelve
DownBB will now execute the script which downgrades your baseband.
How to Downgrade Your iPhone 3G 2.30 (2.2.1) Baseband for Unlock How to Downgrade Your iPhone 3G 2.30 (2.2.1) Baseband for Unlock

Step Thirteen
Once the script has completed it will automatically reboot your iPhone.
How to Downgrade Your iPhone 3G 2.30 (2.2.1) Baseband for Unlock How to Downgrade Your iPhone 3G 2.30 (2.2.1) Baseband for Unlock

Step Fourteen
Please note you will now be on the 2.28 baseband.
How to Downgrade Your iPhone 3G 2.30 (2.2.1) Baseband for Unlock

Step Fifteen
You may now unlock your iPhone using the iPhone 3G unlock tutorial found here!



THANKS
Many thanks to EvilPenguin|, pH, and DHowett for their work on this script! Thanks to Geo-hot for discovering the exploit!
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Comments (216)
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ravdeep
ravdeep - August 26, 2012 at 10:57am
i have iphone 3g bootloader 6.2 .... by mistake i upgraded it to 4.2.1 baseband 5.15.04 .... now its sim is not getting unlocked..... Is there any way to do it......as the baseband cannot be downgraded using fuzzyband......??????????
konteyner
konteyner - November 5, 2010 at 3:55am
au mahal dan/atau tidak terbuka. Kini ketika platform blog telah dibebaskan dengan berbag
prefabrik
prefabrik - November 29, 2010 at 7:24am
vizyon oluşturarak, hedeflerini iştirakli bir şekilde ilerletmektedir. Firmamız Karmod Kabin üretim modelleri dışında müşteri talebine doğrultusunda üretimler de gerçekleştiriyor.
prefabrik evler fiyatları
prefabrik evler fiyatları - August 16, 2010 at 6:36am
prefabrik evler fiyatları
su deposu
su deposu - October 21, 2010 at 6:18am
To put it another way, why learn subject for which there is minimal employment? … Or does this return to the earlier topic of pigeon-hole careers? Perhaps we need to focus our children on the ingredients rather than the recipe. www.kartaldepo.com
Damann
Damann - October 19, 2009 at 11:02am
I have an Iphone 3G with 3.0 and 5.9 bootloader and 05.11.07 baseband.... When are they gonna come out with a fix for this to be unlocked or an update or something... Ive been waiting a long time for this... Plz Help a brother out.... Im stuck like chuck
su deposu
su deposu - August 26, 2010 at 6:20am
think type of site that is useful in sharing information and it is important to shar.Web proliferation of new developments in the field of design and entrepreneurial spirit of people
prefabricated
prefabricated - November 22, 2010 at 4:22am
ut takes it a little further by allowing you to search photos not only by username, but also by tags or a combination of both username and tags. If you find this plugin useful, I would appreciate it if you left a note in the comments.
sanenda
sanenda - October 8, 2009 at 11:05pm
Hello, I have iphone 3g i installed firmware 3.1 by mistake after that i again installed firmware 3.0 after getting errors now i have baseband 05.11.04 something like that, and bootloader 5.90. now I want to unlock my iphone because ultrasn0w is no longer working now.... please help me out.
konteyner
konteyner - October 6, 2010 at 5:15am
that doesn't exactly embrace the avoidance of unnecessary intervention.
Maha
Maha - September 20, 2009 at 4:16am
The solution is to upgrade to 3.0 OS and then use Ultasnow to unlock..it works for 5.9 and 6.2 bootloader.
Shahzad Riaz
Shahzad Riaz - September 21, 2009 at 5:16pm
Still no luck ..i got OS 3.0 and bootloader 6.4... suggestions? cheers.
Naiyadh
Naiyadh - October 1, 2009 at 7:59am
Hey, i have iphone 3g with fw 3.0. my bootloader is 5.09 and bb is 5.11.07. do you think i can do this to downgrade my bb. Please let me know. And thanks for help.
Maha
Maha - October 1, 2009 at 8:29am
Yes It is possible I have OS 3.0 and bb 6.02 *(It was 6.somthing I can't recall). Anyway I used Ultrasnow to unlock my phone. Visit this page and do as they say : http://www.blogsdna.com/3778/how-to-unlock-iphone-3g-30-os-firmware-with-ultrasn0w-06.htm
Salman
Salman - October 2, 2009 at 1:03pm
Hello, I have iphone 3g i installed firmware 3.1 by mistake after that i again installed firmware 3.0 after getting errors now i have baseband 05.11.04 something like that, and bootloader 5.90. now I want to unlock my iphone because ultrasn0w is no longer working now.... please help me out.
Ayman
Ayman - May 29, 2010 at 10:13pm
ya maha could you tell me more how can you make it work with boot loader 08.09 i tried 3.1-3.12-.3.13 nothing is happening
hyper
hyper - July 3, 2009 at 2:32am
thanks for this one, but unlucky for me. Mine has a 5.9 bootloader. is their a new way to downgrade it?
kabin
kabin - August 20, 2010 at 7:33am
yeni projeniz için bir tasarımcı ortağa ihtiyacınız varsa, o kişiye kolaylıkla ulaşmanızı sağlamak istiyoruz. Aynı şekilde projeniz i
muhd sidek
muhd sidek - June 22, 2009 at 7:36am
I cant unlock my phone wit yellowsnow..........its show NO SERVICE>.........pLS any1 help me .......... IPHONE 3G 2.2 baseband 04.26.08..................PLSSSSSS
DRAGAN
DRAGAN - June 20, 2009 at 10:06am
iphone 3g 3.0 modem 04.26.08 unlock the carrier
mmet
mmet - June 18, 2009 at 2:13pm
hello my friend i have iphone 3g 16 gb 3 but i cant use in turkey my phones version 5.9 i cant use with simcard just use turbo sim plz ı need ur help ...
waigal
waigal - June 17, 2009 at 12:20am
i have a 3g iphone with bootloader version 05.09 and baseband version 02.30.03 and OS version 2.2.1 can't downgrade the baseband anyone can help????
mike
mike - June 19, 2009 at 11:34pm
iphone newbie is there a way to downgrade 5.9 bootloader yet please help
the_same
the_same - September 19, 2009 at 9:30pm
same happens to my iphone dude, i did all that shitty bt nothing happnd yet ,,,,
Maha
Maha - September 20, 2009 at 4:21am
Don't worry there is a solution, it has been out for almost 2 months. check http://www.blogsdna.com/3778/how-to-unlock-iphone-3g-30-os-firmware-with-ultrasn0w-06.htm
dr-sotz
dr-sotz - October 2, 2009 at 12:43pm
only jailbroken not unlock if ur bootloader is 5.9 and 6.x
su_deposu
su_deposu - November 9, 2010 at 7:12am
Themes. If you have any suggestions or changes please post a comment. Here is the ChangeLog for the Theme listing all the changes that I made compared to the original theme. http://www.sudeposu.eu
konteyner
konteyner - November 12, 2010 at 7:16am
ully in the way that could in other Zelda games - remember the underground caverns you could once find? http://www.konteyner.com.tr
chuck
chuck - June 14, 2009 at 11:48pm
iphone newbie is there a way to downgrade 5.9 bootloader yet please help!!!
Jaspreet Singh Jolly
Jaspreet Singh Jolly - April 23, 2010 at 10:35pm
u cannot downgrade 05.09 bootloader as it is hardware prob........ if u want to replace 05.09 n u live in new delhi(india) i can help u out for that.... it will cost u a bit high ....... ne 1 interested mail me at jaspreet.jolly.6267@gmail.com
Bryan
Bryan - November 17, 2010 at 1:19am
Did anyone figure out how to downgrade Bootloader 05.09????
vysal
vysal - June 12, 2009 at 4:42am
i install actidently with os 3.0 bootloader 5.9 / modem firmware 04.26.08 ... i can jealbreak but cant unlock the GSM carrier. so any idea.
Nameless
Nameless - December 23, 2009 at 9:11am
isntall blacksnow
smit dave N.
smit dave N. - June 3, 2009 at 12:09pm
hey i have a boot loader version 5.9...plz help how to downgrade to 5.80...plzzz help plzzzz!!!!!!!!!!
akter_hosain
akter_hosain - June 3, 2009 at 2:31am
I have a Iphone 3g, Firmware version 2.25G77, Modem version 2.30.03 Bootloader version 6.04
reex33
reex33 - May 28, 2009 at 10:14am
C'mon!!!! 5.9/6.0 to 5.8 I hope we get this problem solved soon. shhhiiiiitttt......
taha Hadrez
taha Hadrez - May 27, 2009 at 7:46am
sdfg
tony
tony - May 27, 2009 at 1:35am
help me unlock 2.2.1 version, 2.30.03 baseband and 6.04 bootloader iphone.
serenity
serenity - May 26, 2009 at 1:23pm
Thank you for the help. However, yet, the problem could not be solved. Again, we request your help. At present, it is " modem version 02.30.03 ", "OS 5G77". Tell the way of changing into modem version 02.28.0. It tried a down grade in the envoy modem version in the Fuzzyband software. However, because the bootloader version was to do 5.9 being, it isn't possible to do a change. Tell the way of changing a bootloader version into 5.8. Or, tell the way of modem version's being able to be changed in the other way. I request your help.
MrBlue
MrBlue - May 25, 2009 at 10:46pm
Hi, Dev team, we know that you guys are working on upgrading Yellowsn0w to make it possible to unlock bootloader 5.09 - 6.0. Hopefully can be done... don't let Apple laugh at us... poor people who really don't want to be "jailed" and the people who decided to follow your path.
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