Siemens HiPath 4000 Operating Manual page 103

Step by Step
v
Program/Service?
v
PIN / COS?
v
Change COS?
Unlocking the phone:
OK
Select and confirm.
LM
Enter the service code.
or
OK
Select and confirm.
OK
Select and confirm.
~
Enter the PIN (code number).
After a successful entry, "performed" appears.
Privacy/Security
103