If you were Jailbroken you would know it. Excactly what Youngbinks said,
"Do you see the icons "Cydia" or "Installer" located on the phone? If not, I'm 99% sure you're not Jailbroken." - Youngbinks.
It seems to me like your running firmware 2.2.1, non-jailbroken. The thing that says (5H11) just means that the 2.2.1 software is just a version of 2.2.1. I think different countries get different codes.