ZTE Z930L Manuel D’Utilisation

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Here’s how to protect your phone and micro-SIM card 
from unauthorized use. 

You can protect your phone by creating a screen lock. 
When enabled, you need to draw a pattern or enter a 
numeric PIN or password to unlock the phone’s screen 
and keys.
1.   Press  the  Home Key > Menu Key > System 

settings > Security.

2. Tap Screen lock.
3. Tap Long press, Pattern, PIN or Password.

•   If you tap Long press, you must press and hold 

 at the center of the screen to unlock the 

screen. Tap and drag the icon in any direction to 
access application shortcuts.

•   If you tap Pattern, you’re guided to create a 

pattern you must draw to unlock the screen. 
The first time you do this, a short tutorial about 
creating an unlock pattern appears. Then you’re 
prompted to draw and redraw your own pattern.

•   If you tap PIN or Password, you’re prompted to 

set a numeric PIN or a password you must enter 
to unlock your screen. 

The next time you turn on your phone or wake up the 
screen, you must draw your unlock pattern or enter your 
PIN or password to unlock it.

Screen lock options are listed in the 

approximate order of the strength of their security, 
starting with None, which provides no security.
If you forget the pattern you set, try five times and tap 
Forget pattern? to sign in to the Google account you 
have added on the phone and reset the screen lock. 
You need an active Internet connection. You can also 
upgrade the phone software (see Upgrading the  
Phone Software).

You can encrypt all the data on your phone: Google 
accounts, application data, music and other media, 
downloaded information, and so on. If you do, you must 
enter a numeric PIN or password each time you power 
on your phone.
WARNING! Encryption is irreversible. The only way to 
revert to an unencrypted phone is to perform a factory 
data reset, which erases all your data.
Encryption provides additional protection in case your 
phone is stolen, and may be required or recommended 
in some organizations. Consult your system 
administrator before turning it on. In many cases the 
PIN or password you set for encryption is controlled by 
the system administrator.

Before turning on encryption, prepare as 
follows:
1.  Set a lock screen PIN or password.
2.  Charge the battery.

3.  Keep the phone connected to the charger.
4.   Schedule an hour or more for the encryption process: 

you must not interrupt it or you will lose some or all 
of your data.

When you’re ready to turn on encryption:
1.   Press  the  Home Key > Menu Key > System 

settings > Security > Encrypt phone.

2.  Read the information about encryption carefully. 

The Encrypt phone button is dimmed if your 
battery is not charged or your phone is not  
plugged in.
If you change your mind about encrypting your 
phone, press the Back Key.
WARNING! If you interrupt the encryption process, 
you will lose data.

3. Tap Encrypt phone.
4.   Enter your lock screen PIN or password and tap 

Next.

5. Tap Encrypt phone again.
The encryption process starts and displays its progress. 
Encryption can take an hour or more, during which time 
your phone may restart several times.
When encryption is completed, you‘ll be prompted to 
enter your PIN or password.
Subsequently, you must enter your PIN or password 
each time you power on your phone to decrypt it.

Every micro-SIM card comes with a PIN. The initial PIN 
is provided by your mobile phone provider. It’s best 
to lock your micro-SIM card with the PIN as soon as 
you can.
1.   Press  the  Home Key > Menu Key > System 

settings > Security > Set up SIM/RUIM card 
lock.

2.  Check the Lock SIM card check box.
3.  Enter the PIN you’ve been given and tap OK.

You can change the PIN you’ve been given to one 
easier for you to remember and harder for others to 
guess.
1.   Press  the  Home Key > Menu Key > System 

settings > Security > Set up SIM/RUIM  
card lock.

2.   Make sure you have already checked the Lock SIM 

card check box.

3. Tap Change SIM PIN.
4.  Enter the old PIN and tap OK.
5.  Enter your new PIN and tap OK.
6.  Enter the new PIN again and tap OK.