Set unlock PIN code
1.
Click setting application in main interface.
2.
Click safe.
3.
Click screen locked.
4.
Choose PIN in text setting area.
5.
Enter new PIN code (numbers) and click continue.
6.
Enter new PIN code again and click confirm.
Set unlock password
1. Click setting application in main interface.
2. Click security.
3. Click screen locked.
4. Set password in text setting area.
5. Set new password (letters and numbers) and then click continue.
6. Enter the password again and the click confirm.
Unknown sources
1. In main interface, click setting.
2. Click security
3. Click unknown source, as Picture 4.38
Picture 4.37
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