Shortcut On Lock-Screen

1.Go To Settings.

2.Navigate to Lock Screen.

3.Tap Shortcuts and set it to custom.

3.Tap Edit Shortucts and remove anyone you don’t want.

4.Tap the + Icon and scroll down.

5.Tap WhatsApp once you see it and a Shortcut of WhatsApp will be added to your Lock-Screen.

Having Problems?

Now if you still have Problems with the methods mentioned above, that means your device is running an Android version that doesn’t support Lock-Screen Widgets, anything below Android 4.2.2 doesn’t support Lock-Screen widgets if you want such facility then you need to update your device to Android 4.3 or above or at-least Android 4.2.2 Jelly Bean.