Configuring PIN Management
The personal identification number (PIN) of a SIM card ensures security of the SIM card.
Context
A PIN identifies the user of the SIM card and prevents unauthorized access to the SIM card.
If a user enters incorrect PINs three consecutive times, the PIN is locked to protect security of the SIM card. To unlock the PIN, enter the PIN unblocking key (PUK).
A PIN is a decimal integer of 4 to 8 digits. You can obtain the initial PIN from the carrier.
PUKs are provided by carriers. If a user enters incorrect PUKs ten consecutive times, the SIM card is permanently locked and the user needs to obtain a new one from the carrier.
Procedure
- Enabling PIN authentication
PIN authentication prevents unauthorized users from using a SIM card. A user can use an LTE modem only after the PIN is authenticated. If PIN authentication is disabled, anyone can use the SIM card.
- Authenticating a PIN
After PIN authentication is enabled for an LTE modem, the PIN must be authenticated every time you start the SIM card. If PIN authentication fails, the LTE modem cannot provide data communication functions.
- Changing a PIN
After PIN authentication is enabled, you are advised to change the PIN periodically to improve the SIM card security.
- Using the PUK to unlock a SIM card