3.Select the Lock SIM card option.
4.Enter the default SIM card PIN using the keyboard, then touch
OK.
5.To change the SIM card PIN at any time, touch Change PIN code.
Tip
：
Emergency calls can be placed at any time, without requiring a PIN.
To restore a SIM card that has been locked out
If you enter the wrong PIN more times than the maximum number of
attempts allowed, your SIM card will become "PUK-locked." You need a
new PUK code to restore access to the device. This code may have been
provided by your operator when you received your SIM card.
Touch Emergency Dial and enter the following sequence on the
keypad:
**05*[PUK code]*[new PIN]*[new PIN]#
For example
, if your PUK code is 888888 and you would like to
reset the PIN on your SIM card to 7777, enter the following into
Emergency Dial:
**05*888888*7777*7777#
Protect your phone with a screen lock
You can further secure your data by locking the screen and/or
requiring a screen unlock pattern every time your phone is turned on or
every time it wakes up from sleep mode (screen is off).
To lock the screen
