Device Guides
Samsung Galaxy S21 5G
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How to
Change PIN
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.
List view
Find "Set up SIM card lock"
Slide two fingers downwards starting from the top the screen.
Tap the settings icon.
Tap Biometrics and security.
Tap Other security settings.
Tap Set up SIM card lock.
Change PIN
Tap the required SIM.
Tap Change SIM card PIN.
Key in your current PIN and tap OK. The default PIN is 0000.
If an incorrect PIN is entered three times in a row, your SIM will be blocked. To unblock your SIM, you'll need to key in your PUK. The PUK can be obtained by contacting Customer Service. Please note: If an incorrect PUK is entered ten times in a row, your SIM is blocked permanently. In this case, you'll need a new SIM from Optus.
0000
Key in a new four-digit PIN and tap OK.
Key in the new PIN again and tap OK.
Return to the home screen
Tap the Home key to return to the home screen.
Slide two fingers downwards starting from the top the screen.
Tap the settings icon.
Tap Biometrics and security.
Tap Other security settings.
Tap Set up SIM card lock.
Tap the required SIM.
Tap Change SIM card PIN.
0000
0000
Key in your current PIN and tap OK. The default PIN is 0000.
If an incorrect PIN is entered three times in a row, your SIM will be blocked. To unblock your SIM, you'll need to key in your PUK. The PUK can be obtained by contacting Customer Service. Please note: If an incorrect PUK is entered ten times in a row, your SIM is blocked permanently. In this case, you'll need a new SIM from Optus.
Key in a new four-digit PIN and tap OK.
Key in the new PIN again and tap OK.
Tap the Home key to return to the home screen.
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