54 
Setting a screen unlock PIN 
1.
 
On the home screen, touch  . 
2.
 
Under 
All
, touch 
Screen lock & passwords
. 
3.
 
Touch 
Password
 > 
PIN
. 
4.
 
Enter at least four digits and then enter them again for confirmation. 
Setting a screen unlock password 
1.
 
On the home screen, touch  . 
2.
 
Under 
All
, touch 
Screen lock & passwords
. 
3.
 
Touch 
Password
 > 
Password
. 
4.
 
Enter at least four characters, among which one should be a letter, and then enter them 
again for confirmation. 
Turning on or off airplane mode 
 
Your phone's signal reception or transmission may interfere with an airplane's 
flight system. Power off your phone or switch to airplane mode as required 
when you are on a flight. In airplane mode, your phone's wireless features are 
disabled, but you can still listen to music or play games using your phone. 
Use either of the following methods to turn on or turn off 
Airplane mode
: 
 
Flick down from the status bar to open the notification panel. Under 
shortcuts
, touch 
Airplane mode
. 
 
Press and hold the power button, and touch 
Airplane mode
. 
 
On the home screen, touch    then the 
All
 tab. Under 
Wireless & networks
, touch 
More
 and then 
Airplane mode
 to turn on or off airplane mode. 
When airplane mode is on,    is displayed on the status bar. 
Setting the PIN of your SIM card 
A personal identification number (PIN) is delivered with your SIM card to better protect your 
phone data. If you enable the SIM card lock, you must enter the PIN each time you turn your 
phone on. Before you perform the following operations, make sure you have obtained the PIN 
for your SIM card from your service provider. 
1.
 
On the home screen, touch  . 
2.
 
Under 
All
, touch 
Security
.