If you accidentally updated your iPhone 3G/3GS to the latest iPhone OS 3.1/3.1.2, then you’re also stuck with baseband version 05.11. If you recently bought a factory fresh iPhone 3GS with OS 3.1 or 3.1.2 already loaded, then you’re in the same boat. That used to be a bad thing, because baseband 05.11 couldn’t be unlocked to work with unofficial SIM cards. Today’s release of…