How to Downgrade iPhone 3.1 Baseband From 05.11.07 to 04.26.08
Every time there is a new firmware coming out, updating puts you at risk of updating your baseband as well, making it impossible to unlock your iPhone. This time is no different than the others and many people accidentally updated their iPhone to firmware 3.1, updating their baseband to 05.11.07 at the same time.
Fortunately, there is an easy way for iPhone 3G users to downgrade their baseband from 05.11.07 to 04.26.08. Note that this is for iPhone 3G users only. If you have an iPhone 3GS, then read my article on how to downgrade the iPhone 3GS firmware from 3.1 to 3.0.
1. First, your iPhone 3G has to be jailbroken. For more information, read my iPhone 3.1 jailbreak article.
2. Launch Cydia and search for the Fuzzyband app. Install it and reboot your iPhone.
3. Launch the Fuzzyband app and tap “downgrade” to start downgrading your baseband from 05.11.07 to 04.26.08.
4. Reboot your iPhone. You should now be on baseband 04.26.08 and be able to jailbreak and unlock your iPhone using UltraSn0w.
Note that downgrading only works on iPhones that have the 05.08 (5.8) bootloader from the factory, which is just a very limited amounts of iPhone 3G that were released in the first few weeks of the production cycle. If you don’t know your bootloader version, you may run Fuzzyband and it will tell you what version you have and whether or not you can downgrade your baseband.
Tags: Baseband, Downgrade, iPhone OS 3.1
Dear sir my fuzzyband shows that my bootloader version is 5.9 and i cant downgrade it.Please advise again?
did you used fuzzyband exactly how it’s described on this tutorial ? and what error message did you received ?
ahh.. i see.. unfortunately you will have to wait.. if you say that your baseband is 5.9 that is bad.. because fuzzyband can downgrade from 5.8 and lower version.. i am sorry.. but if i’ll have some solutions i’ll post it here..
Thanks a lot.
That means i would not be able to access my phone network till i get the latest unlock 3.1 that matches my modem firmware 05.11.7?
I do not have a backup ECID or SHSH files with cydia and i cant downgrade my baseband even if i downgrade my firmware back to 3.0.
Any other alternative that i can get my network back sir???
to get network back try to downgrade to firmware 3.0, here are a lot of people with similar problems and no solutions yet.. if i will find some tips or tricks to hack baseband i will post it on this blog.
Thanks if i downgrade to 3.0 and jailbreak it,will i be able to unlock my network?
GSM network will not be unlocked but wi-fi yes.
Dear sir my firmware 3.1 is jailbreak and i have no problem accessing my wifi and menu just that i cant use my phone network.Thanks.
Hi Teng.. good news :) here http://www.blackra1n.com/ soon will be published software that will make you happy :D i am waiting too for this tool :P
Thank you sir.
Dear sir is there any fuzzyband downgrader that can downgrade boatloader 5.9 yet?Or any other recommendaion that i can unlock now?I think blackra1n can only jailbreak the phone right?
Hello Teng, good news !! read this article http://freeiphonehacks.com/iphone-os-3-1-2-unlock-arrives-november-4th/ all iPhone community is waiting for this unlock! but until this day no unlock was made :( we all are waiting for GeoHot unlock tool.