Is that a light in your pocket?
Apple makes it simple to turn on an iPhone’s flashlight from the lock screen—too simple. All of us have found ourselves noticing our pocket is glowing, or lift our phone and assault someone in the eye with our phone’s LEDs. Unfortunately, Apple doesn’t offer a way to disable the Flashlight button (nor the Camera button) from your lock screen.
However, if you find it a common annoyance, you can make a tradeoff in ease of waking your phone to avoid triggering the flashlight (or Camera app).
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USA — software How you can keep your iPhone flashlight from turning on by accident