Samsung A420 - Manual (Page 82)

66 Section 2C: Setting Your Phone’s Security
Using Special Numbers
Special numbers are important numbers that you have
designated as being “always available.” You can call and
receive calls from special numbers even if your phone is
locked.
You can save up to three special numbers in addition to
your Contacts entries. (The same number may be in both
directories.)
To add or replace a special number:
1. Select Menu > Settings > Security.
2. Enter your lock code. (The Security menu is displayed.)
3. Select Special #.
4. Select a location for your entry and press .
5. Enter the number and press .
Note: There are no speed dial options associated with special
numbers.