Nokia 3.1 user guide
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Change your SIM PIN
If your SIM card came with a default SIM PIN, you can change it to something more secure. Not all network service providers support this.
Select your SIM PIN
You can choose which digits to use for the SIM PIN. The SIM PIN can be 4-8 digits.
- Tap
Settings >Security & Location >SIM card lock . - Under the selected SIM card, tap
Change SIM PIN .
Tip: If you don’t want to protect your SIM with a PIN, switch Lock SIM card to Off , and type in your current PIN.