Default [Q] Can't get a unlock code for S2

Hey, I recently bought a S2 device with a carrier lock and I've rooted my S2 and tried the unlock app by chainfire, Galaxy_S Unlock by Helroz but to no avail. So what should I do, are there any more apps to try? Also I have no idea what hardlock is and maybe it is hardlocked and that's why apps don't work.