Suppose u want to make 5555 ur secret lock/unlock code then follow this procedure to registerd this code...simply Dial 123 5555 5555 than wait for the acceptance tone then disconnect the phone..now ur code is registerd....
Suppose u want to change ur current (5555) code to 8888 then dial 123 5555 8888 then wait for the acceptance tone then disconnect ur phone...now ur code have been changed in 8888 successfully.....
How to Lock/Unlock LOCAL call
For lock all local outgoing call dial 124 5555 1......for unlock all local outgoing call dial 124 5555 5.......
For lock all STD outgoing call dial 124 5555 1......for unlock all local outgoing call dial 124 5555 3.......
How to Lock/Unlock ISD call
For lock all lSD outgoing call dial 124 5555 0......for unlock all local outgoing call dial 124 5555 2......