I've bought a secondhand Iphone off ebay that is locked to O2. I wish to use the Iphone using an Orange pay monthly SIM card, therefore I need to unlock the Iphone.
I understand that O2 have an unlocking service click here however I presume this is for someone who is already on O2 - as it asks for the mobile number (or would this work if I provided the Orange number I plan to use in the Iphone?)
Anyway, I'm looking for advice on how to go about unlocking the Iphone. It's on software version 3.0. I'd prefer to avoid having to jailbreak it if possible.