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If you would like to check what bootloader your iPhone is running, this tutorial will guide you through on how to check if you’re on Mac OS X.

Before we begin, Make sure you have OpenSSH and Terminal installed on your iPhone. If not, go into Cydia and install OpenSSH and MobileTerminal. – Alright, now, lets begin.

1. Download BBUpdaterExtreme from here and save it to your desktop.
2. Launch the Terminal application from Applications/Utilities.
3. Make sure you iPhone is connected to the same wireless network as your computer and determine its IP Address

Click more for the rest of the tutorial. Note: Warning, contains lots of images if you’re on dialup it may take a while to fully load!


4. Enter the following command into the Terminal window replacing the IP Address below with the one for your iPhone.
   scp ~/Desktop/BBUpdaterExtreme root@192.168.1.121:/bin/BBUpdaterExtreme

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

6. Input the following command to ssh into your iPhone. Again, replace the IP below with your own
   ssh root@192.168.1.121

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

8. Input the following commands into the Terminal window
   cd /bin

9. chmod 755 BBUpdaterExtreme

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

11. Your iPhone will now loose its network connections. Launch Mobile Terminal from the iPhone SpringBoard (Homescreen)
12. Type su into the terminal window. When asked for a password input alpine as the password.

13. 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

NOTE: 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.

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