If you’re as curious as me about your iPhone and want to know for sure what your Bootloader or Baseband is, this is a nice little app to install with installer.app (you need a jailbroken iPhone of course) that will tell you info. You may need to add the source in the installer sources in order to see it listed. Here is the source to add: http://s.apfelphone.net
The language may be German, I’m not sure, but if you install it, it works (only the info about the application is German, the actual Baseband and Bootloader report is English).
To install go to Install – Categories – and you should see the source there, look for Baseband info in Apfelphone.net tools and install. Click home, your springboard will reset, when you return it will installed on your screen. Run it, and it will tell you all you need to know.
The source does not work
Yes, this entry was done almost a year ago, a lot has changed in the Jailbreak world, including all of the available apps and repos.