Lenovo TAB 2 A10-70 User Manual page 25

Tap Settings > PERSONAL >Security to access security settings, which
include: SCREEN SECURITY, ENCRYPTION, *SIM CARD LOCK,
PASSWORDS, DEVICE ADMINISTRATION and CREDENTIAL STORAGE.
SCREEN SECURITY: You can set the screen lock method and owner information
to be displayed on the lock screen.
Screen lock: You can unlock the display in one of six ways: Slide, Face
Unlock, Voice Unlock, Pattern, PIN and Password. You can also
deactivate the screen lock by selecting None as well.
Tap Slide, so that you can tap the lock icon to unlock the display.
Tap Face Unlock, facing the screen and let your face in the dotted
lines, when your face information is collected, you can unlock the
display with your face.
Tap Voice Unlock to say some words you will use to unlock the
display.
Tap Pattern, use your finger on the screen (as illustrated) to draw
an unlock pattern.