Huawei U3900 User Manual page 28

Settings
PIN
Verification
Master
reset
Master
clear
Clear
temporary
data
Description
Enable or disable PIN
verification.
Restore your phone to its
default settings.
Restore your phone to
default settings, and clear
your personal data.
When the memory is
insufficient, clear the
following temporary data:
web pages, messages, and
temporarily downloaded
files.
Menu > Settings >
Security > PIN
Verification
Menu > Settings >
Security > Master
Reset
Menu > Settings >
Security > Master
Clear
Menu > Settings >
Security > Clear
Temporary Data
27
Menu selection