The iPhone is a cellular phone that features a large screen and a multi-touch graphical user interface. The device does not have a separate keypad, so, to use the iPhone, you need to see the text and images on the screen. When in the sunlight, it is sometimes difficult to see the screen. To improve viewing in the sunlight, you can increase the brightness of your iPhone's screen.
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Tap the "Settings" icon.
Select the "Brightness" option.
Move the "Brightness" switch to the right to increase the brightness of your iPhone's screen. When using your iPhone in the direct sun, moving the switch all the way to the right will make the screen easier to view.