Baseband

GeoHot Working on Unlocking iPhone Baseband 05.11.07 for a $10,000 Bounty

Sébastien Page ∙ Updated January 24, 2016

GeoHot, the little genius behind BlackRa1n is back at work and is reportedly working on an unlock for baseband 05.11.07. Baseband 05.11.07 is the latest baseband version of the iPhone OS 3.1.2 which is not unlockable for the time being.

The Dev Team has been working on unlocking 05.11.07 for a while without much success so let's hope GeoHot will be a bit more lucky...

There is something that ticks me though. At first GeoHot said he would not work on an unlock for 05.11.07. Fastforward 24 hours later and GeoHot changed his mind when he was offered $10,000 by Jody Sanders to develop an unlock for the latest iPhone OS.

How to Downgrade iPhone 3.1 Baseband From 05.11.07 to 04.26.08

Sébastien Page ∙ September 29, 2009

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.

Note that this trick 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.

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.

iPhone OS 3.1 Beta Is Out. Jailbreakers, Stay Away!

Sébastien Page ∙ July 1, 2009

Apple released the 3.1 beta firmware and SDK to developers, which seems to include a few new features such as:

Non-destructive video editing Voice Control over Bluetooth iPhone vibrates when moving icons New APIs to enable third party apps to access videos and edit them "Fraud Protection" toggle Faster boot time

The biggest change is the update of the baseband to 5.08.01.

If you don't care about jailbreaking or unlocking your iPhone, then this doesn't matter to you. However, if you want to keep you device jailbroken/unlocked, you should not update to 3.1 beta, or even the official 3.1 firmware when it's released to the general public.

Like the Dev Team warned us, updating to 3.1 will prevent you from running any jailbreak method, which would make it impossible to unlock.

Ultrasn0w users must stay away from any firmware updates past 3.0 (including today’s 3.1 beta) until we release the tools that let you update the firmware without updating the baseband. For most phones out there, baseband updates are irreversible and you’ll lose ultrasn0w.

This warning does not apply to the iPhone 2G, which uses BootNeuter for the unlock, not ultrasn0w.

My advice is to wait and see. The Dev Team is most likely already picking the 3.1 beta apart. Stay tuned for more updates as they become available.

How to Downgrade Baseband 2.30.03 to 2.28.00

Sébastien Page ∙ Updated January 23, 2016

If you like this post, please feel free to digg it, or subscribe to our RSS feed, or follow me on Twitter, or all of the above ;)

[digg-me]Since firmware 2.2.1 came out and updated the baseband from 2.28.00 to 2.30.03, many people accidentally updated, and are now stuck on baseband 2.30.03. I wonder how you can "accidentally update" your firmware as it takes a few steps, but anyways... I've had a few emails from people asking me how to downgrade baseband 2.30.03 to 2.28.08.

If you're looking to unlock your iPhone with YellowSn0w, you can't do that as long as you will on baseband 2.30.03. Unfortunately, you can not downgrade baseband 2.30.03 to 2.28.00! Sorry folks but you should have read the Dev Team's warning!

Now the good news is that I'm very confident the Dev Team is working on updating YellowSn0w so it works with firmware 2.2.1, baseband 2.30.03.

You can still downgrade your firmware from 2.2.1 to 2.2 in iTunes by hitting SHIFT + RESTORE and selecting firmware 2.2 but you will most likely have errors and even if you manage to downgrade, you still won't be able to downgrade the baseband.

UPDATE: It's now possible to downgrade your baseband thanks to pHaseBanDowngrader

pH (Pedro Henrique Franceschi) created a tool to help you downgrade your baseband from 2.30.03 to 2.28.00. To use this tool, you have to have to have an iPhone with bootloader 5.8. If your iPhone was manufactured before September 2008, you're good. If you bought your iPhone after September 2008 with firmware 2.2.1 out of the box, then you can't use pHaseBanDowngrader because your bootloader is 5.9.

Here are the instructions on how to downgrade using pHaseBanDowngrader:

1. Download this file 2. SSH into your iPhone and put the downloaded folder (phasebandowngrader) inside the folder /Applications/ 3. In MobileTerminal.app, type “login” and enter “root” as user, the default password is “alpine” 4. Now, type “cd /Applications/phasebandowngrader && ./phasebandowngrader”. Follow the screen instructions 5. Done!

Again, a big Thank You to pH for developing this tool.