Adding a flashlight option to the iPhone might have been one of the most useful additions to any iOS. Such a simple thing, that I and millions of other iPhone owners use on a regular basis. The only real drawback is needing to swipe up the Control Panel whenever you need to turn ON or turn OFF the flashlight. If you are actually stuck in a completely dark room, doing that action can actually be difficult. This is where a physical button or a tap on the Home screen would be a great workaround.
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