Nokia 300 User Manual page 87

3. Type in a new code. You can only use numbers, and at least 5
numbers are needed.
Keep the security code secret and in a safe place separate from your
phone. If you forget the security code and your phone is locked, your
phone will require service. Additional charges may apply, and all the
personal data in your phone may be deleted. For more information,
contact Nokia Care or your phone dealer.
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