LG -G510 User Manual page 127

You can add phonebook entry by using this function.
Phone memory capacity is 200 entries. SIM card memory capacity
depends on the cellular service provider.
You can also save 20 characters of name in the Phone memory, and
you can save characters in the SIM card. the number of character is
SIM dependent feature.
Open the phonebook first by pressing
mode.
Scroll to highlight
Select the memory you want to save:
: You can add name and number for entry.
: You can add name, mobile, home, office, fax no., and
E-mail address.
24
, and press
Write a name to add.
Press [OK], then you can input a number.
Press [OK].
If you want to add the voice, press
Write a name to add.
Press [OK].
Enter the numbers following as mobile, home, office,
and fax by pressing
E-mail address.
If you want to add the Voice, press
[Names] in standby
[Select] to enter.
or .
[Yes].
[OK]. Also, you can input
[Yes].