LG -TM510 Operator's Manual page 23

Key(SAVE) on the left, to add the emergency phone numbers. Enter the memory address
when a message appears to request the memory address on the following image, and then
press the Soft Key(SAVE) on the left to store it. Select "Erase All" to erase all the emergency
phone numbers. Then, a message will appear to confirm the command. Select the Soft
Key(YES) on the left to erase all the emergency phone numbers.
6. New Code ( F [MENU]-7-6 )
This service enables replacing of the present terminal Lock Code in four digits with a new
Lock Code. A message will appear to confirm the command to change the lock code.
22 M510 Ver. 1.1.5