Enabling the Subscriber Identity Module (SIM) Personal Identification Number (PIN) locks the SIM card so that it cannot be used until the correct code is entered. If the incorrect PIN code is entered too many times, a PIN Unblocking Key (PUK) must be obtained from Verizon Wireless.
From a Home screen, tap Apps (located at the bottom).
From the Apps tab, tap Settings .
Tap Security .
Tap Set up SIM card lock.
Tap Lock SIM card. Enabled when a check mark is present.
Enter the current SIM PIN then tap OK. The default SIM PIN is 1111.