How to Check iPhone 3G bootloader

Checking iPhone 3G bootloader is easy follow steps below.

1. Download BBUpdaterExtreme in this LINK Unzip the file. BBUpdaterExtreme is located inside Update_Baseband_02.28.00 folder.

2. Upload BBUpdaterExtreme in root using DiskAid.

3. Install MobileTerminal in Cydia (if you don't have it yet).

4. Once installed, open MobileTerminal.

5. Type the commands below line per line and hitting return button after each line. Take note of the caps.

6. login/type su

7.password: alpine
Note: when you type alpine, nothing is really displayed on screen. This is normal. Just continue typing.

8.type: cd /

9.type: chmod 755 BBUpdaterExtreme

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

11.type: ./BBUpdaterExtreme queryversion

12.You will see the screen below. As you can see, my iPhone 3G has bootloader 05.09



Credits to geohot for everything.

* Applei.ph and Jaytrix for guide