Nokia C21 User Guide
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.
1. Tap Settings > Security > Advanced > SIM card lock .
2. Under the selected SIM card, tap Change SIM PIN .
ACCESS CODES
Learn what the different codes on your phone are for.
PIN or PIN2 code
PIN or PIN2 codes have 4-8 digits.
These codes protect your SIM card against unauthorized use or are required to access some
features. You can set your phone to ask for the PIN code when you switch it on.
If you forget the codes or they aren’t supplied with your card, contact your network service
provider.
If you type in the code incorrectly 3 times in a row, you need to unblock the code with the PUK
or PUK2 code.
PUK or PUK2 codes
PUK or PUK2 codes are required to unblock a PIN or PIN2 code.
If the codes are not supplied with your SIM card, contact your network service provider.
Lock code
Lock code is also known as security code or password.
The lock code helps you protect your phone against unauthorized use. You can set your phone
to ask for the lock code that you define. Keep the code secret and in a safe place, separate
from your phone.
If you forget the code and your phone is locked, your phone will require service. Additional
charges may apply, and all the personal data on your phone may be deleted. For more info,
contact the nearest authorized service facility for your phone, or your phone dealer.
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