Lock Unlock Codes For Land Line Users

This is only for Land line Phones.How To Register Secret Code.Suppose you want to make 5555 your secret code.Follow this procedure:Dial 123 5555 5555 then wait for the acceptance tone then disconnect. Your code is registered.How To Change Secret Code.Suppose you want to change current code 5555 to 4444 then Dial 123 5555 4444 then wait for the acceptance tone then disconnect. Your