When trying to unlock my phone, I get an error message saying something like: "unable to remove restriction".

Does this mean that I can not unlock the phone? How can I get around this? I have a Nokia 3510i.

Would a cable allow me to unlock the phone? If so, which cables would be best (and where's a good place to get one). I know nothing about the differences between Mbus & Fbus...

Thanks,
Rich