Samsung Galaxy S® 6 / S® 6 edge - Turn SIM PIN On / Off
Enabling the Subscriber Identity Module (SIM) Personal Identification Number (PIN) locks the SIM card so it can't be used until the correct code is entered. If the incorrect PIN code is entered too many times, refer to Locating the 4G SIM PIN/PUK - My Verizon Website to obtain a new PIN Unblocking Key (PUK).
From a Home screen, navigate: Apps > Settings > Lock screen and security (Personal section).
Tap Other security settings.
Tap Set up SIM card lock.
Tap Lock SIM card to turn on or off .
Enter the current SIM PIN then tap OK.
The default SIM PIN is 1111.