How to Enable Lock Screen Widgets on KitKat
If you already own an Android device running Android 4.4 KitKat (Let' say Nexus 5), you have noticed lock screen widgets are not enabled by default ...
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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: