Phone Lock; Pin And Puk - Huawei U3900 User Manual

Phone Lock

Phone Lock protects your phone from unauthorized use. By
default, the function is disabled. To enable or disable Phone Lock,
select Menu > Settings > Security > Phone Lock. Once it is
enabled, you must enter a passcode each time you power on the
phone.
The preset passcode is 000000. You can select Menu >
Settings > Security > Change Phone Lock Code to change your
passcode to any numeric string of four to eight digits.
Please do not forget your passcode. Should you forget it, contact
your local device retailer.

PIN and PUK

The personal identification number (PIN) protects your SIM card
from unauthorized use. If you incorrectly enter the PIN a specified
number of times consecutively, the PIN is blocked and your phone
prompts you to enter the PIN unblocking key (PUK). If this occurs,
enter the PUK to unblock the blocked PIN.
If you incorrectly enter the PUK a specified number of times
consecutively, the SIM card will be permanently disabled, and you
must contact your service provider for a new SIM card.
Both the PIN and PUK are provided with your SIM card. For details,
contact your service provider.
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