Samsung SCH-N330PWVXAR - Manual (Page 114)

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Change lock
The default lock code for your phone is 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 left soft key ( ) Menu , then
press , for Security . You’re prompted to enter
the lock code. The default lock code is the last four digits
of your telephone number.
2. Press for Change Lock . You’re prompted to enter
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.
Your phone does not allow you to view the lock code for
security reasons. If you change the lock code, be sure to
write down or memorize the new code.
Emergency numbers
Your phone provides the option of storing three emergency
numbers. Each number can be up to 32 digits in length. All
emergency numbers can be dialed manually at any time,
even when your phone is in locked or restricted mode.
Emergency number 911 is coded into your phone. You can
dial this number any time, even when the phone is locked or
restricted. If you call 911, an audible tone is heard and an
Emergency prompt appears in the display for the duration of
the call.