LG G5220 - Manual (Page 29)

Accessing the Menu
ENGLISH
29
You should speak a word within 2 seconds, and the phone asks you
to speak it again to ensure the accuracy of voice recognition. After
voice recognition has finished, Voice is attached automatically.
Note
• The voice can only be attached to main number which you
set. For example, If you change main number voice will be
automatically attached changed number. This means that
you cannot attach voice to mobile, office, home number
simultaneously.
• You can add voice tag to phone number in SIM card.
The voice tag can be erased if you remove or change SIM
card.