iPhone, press the Home & Sleep buttons and the screenshot image will be saved instantly. On an Android device, press the Volume Down & Power button simultaneously to capture whatever is currently on your screen. And in the case of Windows Phone 8, press and hold the Start and Power buttons at the same time to take a screenshot.
That’s a raw screenshot saved in your camera roll but you also need to add the hardware frame around your screenshots so that the captured images appear more realistic and provides better context to the viewer.
