Samsung SCHU520 User Manual page 216

On Power up — The phone locks automatically the next time
your phone is powered ON (The phone stays locked until you
enter the lock code.)
3. Use the navigation keys to highlight the Device Lock
Mode option of your choice.
4. Press the
highlighted option.
Change Lock
The default lock code for your phone is generally the
last four digits of your phone number. It is advisable to
change the default lock code to a secret code for
security purposes.
1. In standby mode, press the Menu (left) soft key (
then press
Settings), and
enter the lock code.
Note: The default lock code is the last four digits of your telephone number.
2. Press
the new lock code.
3. Enter the new lock code. You're prompted to re-enter the
new lock code for verification.
4. Enter the new lock code again. Your changes are stored.
Note: Your phone does not allow you to view the lock code for obvious
security reasons. If you change the lock code, be sure to write down or
memorize the new code.
216
key to perform the function for the
OK
(for Settings), and
for Security. You're prompted to
for Change Lock. You're prompted to enter
),
(for Phone