How to Activate Jelly Bean’s Face Unlock “Liveness Check”
Go to Settings > Security and choose Face Lock as your screen lock, set it up and then as you finish, check the box for “Liveness check.” Now you ...
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One of the ways in which you can add new people to your Line friends list, is using the QR Code.
Open the application, and follow these steps: More - Settings - Privacy - Generate QR Code
Now all your friend needs to do in order to add you is follow the steps shown below: