If your iPhone flashlight isn't working, however, you don't necessarily have to be left in the dark.
Here are four ways to fix an iPhone flashlight that won't turn on.
If your iPhone's battery is almost empty, the flashlight may not work. This is all the more true if the phone is very warm or very cold, conditions that already reduce its proper function. Charge your iPhone, get it down to a moderate temperature, and try again.
If your phone's camera app is open, the flashlight won't be able to take control of the LED.
Turning your iPhone off and on again may refresh the software and restore the flashlight.
Hold the Sleep/Wake button on your iPhone until the "Slide to power off" option appears and shut the phone down, or perform a force restart.
If a basic restart doesn't do it, reset your phone's settings. You won't lose any data, images, or other stuff, but you may need to reset your wallpaper and alarms and other basics.
1. Launch the "Settings" app, then tap "General."
2. Then tap "Reset," and finally "Reset All Settings."
3. Tap "Confirm."
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