Unlock the outgoing ban service

What do you mean by "outgoing ban"? Do you have a message that says invalid SIM, emergency calls only?

If so, that means your phone is carrier locked and the SIM in have in the phone is NOT from the correct carrier.

ONLY the carrier it is locked to can authorize unlocking the phone.

Or if your carrier has for some reason stopped you making outward calls, you would still need to get in touch with them.