Launch VZAccess Manager.
From the Windows desktop, navigate: Start > All Programs (Programs) > VZAccess Manager.
With Windows 10, click Start > Apps icon (located in the top-left corner) > All apps (located in the bottom-left corner) > VZAccess Manager.
If presented with Unblock SIM card window, skip to step 6.
If presented, enter the PIN then click OK.
The default PIN is 1111.
Click Options > Preferences.
From Device Settings, click Unblock SIM PIN.
Enter the following information then click OK.
PIN Unblocking Key (PUK)
The 8-digit key obtained from step 1.
A PIN code consisting of 4 to 8-digits.
Confirm new PIN
Retype desired PIN code.
If an invalid PUK is entered too many times, the SIM card is permanently disabled.