When you are going to do something like jailbreak or unlock sometimes your tool mentioned as supports particular basebands. This kind of situation suitable tool is “f0recast”. It shows..
Serial No
Baseband
Bootloader
Model
Jailbreakable
Unlockable
Before you are running this tool please connect your iDevice otherwise it will show message. You can download this tool for Windows and MAC platforms. f0recast developed by http://ih8sn0w.com/.