How to lock/unlock Globelines telephone...updated!

FOR LOCK/UNLOCK PROCEDURE:

LOCK:
Dial #5702 4-DIGIT-PIN #

UNLOCK:
Dial #5712 4-DIGIT-PIN #

CHANGE PIN:
Dial #575 Old-4-DIGIT-PIN *New-4-DIGIT-PIN **New-4-DIGIT-PIN *#


DEFAULT PIN:  1234