Haier C6300 User Manual page 21

Contrast You can adjust the contrast of the display for varying light conditions.
Clock time You can set the clock mode which shows in the standby mode.
Wallpaper You can select different wallpapers as per your requirement.
Security
To access security every time, you must enter the preset security code. By
default, the code is 0000. If none of this works, contact your wireless service
provider for help.
Phone lock The phone lock feature protects your phone from unauthorized
outgoing calls or unauthorized access to information stored in the phone. When
phone is locked, to unlock, user must enter the preset security code. When the
device is locked, you can still call the official emergency number programmed
into your phone.
Change code By default, the preset lock code is 0000.
Emergency numbers: You can use your phone for emergency calls. However,
connections in call conditions cannot be guaranteed. You should never rely
solely on the phone for essential communications.
Reset to default
Reset setting : Use this menu to reset the phone's settings you have changed.
Reset phone : Use this menu to clear all data (include Call History, Contacts
(Phone) or Message (Phone)) that you have stored.
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