To open the Camera app

Tap the Home Button > the Apps icon > Camera .

OR
Tap Camera from the Home screen.

OR
If you’ve recently used the Camera app, tap Camera in the Second screen.

NOTE
The Second screen is also displayed on the Lock screen. Perform your unlock method after tapping the icon, if necessary.

OR
From any Lock screen except Swipe, drag the Camera icon at the lower-right corner to the left.

TIP!

With the backlight off, press the Volume Down Button twice to immediately take a quick picture using Auto photo mode and the last lens selected. Checkmark the Quick shot box in the Shortcut key settings to enable this shortcut feature.