LG G5400 User Manual page 158

You can delete all entries in SIM, Phone, and Voice. This function
requires Security code except for voice.
Press > [Names] in standby mode and select Delete all, press
<[Select].
Then select a memory to erase.
Enter security code and Press < [OK] or > [Back].
Use this function to access a particular list of services provided by
your network operator (if supported by the SIM card).
Open the phonebook first by pressing > [Names] in standby
mode and select
Scroll to
The names of the available services will be shown.
Use U and D to select a service. Press S [Send].
This feature allows you to see how many free and in-use are in
your phonebook.
Open the phonebook first by pressing > [Names] in standby
mode. Select
Scroll to
You can check your own number in SIM card.
.
, then press < [Select] to enter.
by pressing < [Select].
, then press < [OK].
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