Restriction code?

Bama said:

Now that I have exhausted the number of tries for Unlocking a Nokia 6280 and am getting a message "can not undo restriction" I now understand I can only do it using cables, Am I to use the ordinary CA-53 or am I to take it to phone reapair shop

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If your phone is asking for Restriction code means it is locked to some particular network.So it is better unlocking your phone by using online service.Online service is recommended as you can unlock your phone from anywhere in the world.
I suggest Superunlockcodes.com where they unlock your phone and also provide free unlocking instructions.