Hey I'm new here, Ive been on before for help on jailbreaking the iPod. Heres the problem. I just got an iPhone off my dad who says it was unlocked as he has been using an Orange SIM in it for a while now. Im on O2 so I put my SIM into the iPhone and it says "SIM Locked" with the options OK and UNLOCK. What does this mean and what do I do as Ive been able to use it on other phones no problem.