Nokia C21 Plus Bedienungsanleitung
Change your SIM PIN code
If your SIM card came with a pre-set PIN code, you can change it to something more secure. Not all network service providers support this.
Select your SIM PIN code
You can choose which digits to use for the SIM PIN. The SIM PIN code can be 4-8 digits.
- Tap
Settings >Security >Advanced >SIM card lock . - Under the selected SIM card, tap
Change SIM PIN .