Your PIN protects your SIM from unauthorised use if your mobile phone should get stolen. You can change your PIN to a PIN of your own choice making it easier to remember. Before you can change your PIN, you need to turn on use of PIN.
Tap Additional settings.
Tap Safety and privacy.
Tap Set up SIM card lock.
Tap Change SIM PIN.
Key in your current PIN and tap OK. The default PIN is 0000.