LG G3100 User Manual page 167

You can search a city which you want within only city database ina
phone. If you didn't find a city, you can set a city manually after
calculating latitude and longitude.
Enter the menu by pressing U , D key and < [Select] key.
Input the city name.
You can set a city which you want.
You can set a city with calculating a latitude.
You can set a city with calculating a longitude.
Search
Manual calculation
Select Back
62
Latitude
Longitude
Select Back
West
Set Back
East
Set Back