Samsung SGH-C207CSACIN - Manual (Page 38)

Selecting Functions and Options
37
Locking or Unlocking the Keypad
You can lock the keypad to avoid pressing keys by
mistake.
To lock the keypad manually, press and hold the key in
Idle mode until the “Key Pad Locked” message displays.
To lock the keypad automatically, use the Auto Key Lock
option (Menu 9.1.4).
In the key lock mode, you can dial emergency calls and
answer incoming call using keypad.
When you end the call, your phone returns to the key lock
mode after a given period time.
To exit the key lock mode, press the Unlock soft key and
then press the key.
The “Keypad Active” message displays.