Huawei F261 Manual page 8

Phone Lock
To set the phone lock, select Settings > Security Settings > Phone
Lock. You can change the default phone lock code (0000) to a
personalized password.
 Note:
When restoring the phone to factory settings, you must
enter the correct phone lock code.
Keypad Lock
In standby mode, press and hold the # key to lock the keypad.
In standby mode, press the Left function key and then the * key to
unlock the keypad.
(Optional) PIN and PUK
A Personal Identification Number (PIN) protects your UIM card from
unauthorized use. A PIN Unblocking Key (PUK) is used to change a
blocked PIN. If you enter an incorrect PIN a pre-defined number of
consecutive times, your UIM card will be locked and the phone asks
you to enter the PUK to unlock it. Both the PIN and the PUK are
supplied with the SIM card. For details, contact your service provider.
FAQs
If problems occur during the use of the phone, refer to the following
sections for a proper solution. If a problem persists, contact your
phone vendor.
Phone Cannot Be Powered On
1. Remove the battery cover and check whether the battery is
installed properly.
If the battery is properly installed, a possible cause for the
problem is that the battery power is low.
2. Charge the battery, and then try to power on the phone.
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