These are instructions on how to find your iPhone Bootloader version using BBUpdaterExtreme. You can use these instructions to determine if an unlock is possible on an accidentally upgraded iPhone 3G.

Before you begin please have MobileTerminal and OpenSSH installed from Cydia. You can find MobileTerminal in the Terminal Support section of Cydia. For instructions on how to install an application from Cydia you can use this tutorial.


Step One
Download BBUpdaterExtreme from here and save it to your desktop.

Step Two
Launch the Terminal application from Applications:Utilities.


Step Three
Make sure you iPhone is connected to the same wireless network as your computer and determine its IP Address using these instructions.

Step Four
Enter the following command into the Terminal window replacing the IP Address below with the one for your iPhone.
scp ~/Desktop/BBUpdaterExtreme root@192.168.0.125:/bin/BBUpdaterExtreme


You will be asked for your password. Enter alpine as the password.


Step Five
Input the following command to ssh into your iPhone.
ssh root@192.168.0.125


You will asked for your password. Enter alpine as the password.


Step Six
Input the following commands into the Terminal window
cd /bin


chmod 755 BBUpdaterExtreme


launchctl unload /System/Library/LaunchDaemons/com.apple.CommCenter.plist


Step Seven
Your iPhone will now loose its network connections. Launch Mobile Terminal from the iPhone SpringBoard.


Step Eight
Type su into the terminal window. When asked for a password input alpine as the password.


Step Nine
Now input BBUpdaterExtreme queryversion to get the bootloader version of your iPhone. It will look something like Boot Loader Version: ICE2_BOOT_05.08_G2M3S2



NOTES: You will need to restart your iPhone to regain network connectivity. You could also type launchctl load /System/Library/LaunchDaemons/com.apple.CommCenter.plist into the terminal window.