LG Style 3 Instruction Manual page 62

Changing PIN
Enable PIN beforehand.
From the Home screen, tap
a
"Settings" → "Lock screen &
security"
"Set up SIM card lock"
b
"Change SIM PIN"
c
Enter the current PIN, and tap "OK"
d
Enter a new PIN and tap "OK"
e
Enter the same PIN that you entered
f
in step 5 and tap "OK"
60
Preparations before Using