It’s probably a low battery issues or your iPhone is too hot.
How to Fix the Flashlight
Be sure your phone is properly charged.
If there isn’t enough juice left in the battery, your flashlight won’t work.
Turn off Low Power Mode.
This is a great iPhone feature but it can disable your flashlight.
kill the Camera app.
Many software problems and bugs can be fixed by simply restarting the unit.
This resets some temporary configs that cause apps and features to malfunction.
Perform a hard reset.
A basic restart sometimes isn’t enough to fix a problem.
Reset the iPhone prefs.
This process is not as dramatic as it sounds, as it doesn’t erase your data or apps.
Erasing the iPhone parameters may delete your wallpaper.
Restore the iPhone to a previous backup.
Restore the iPhone to factory tweaks.
This is a more extreme, time-consuming solution that should resolve a faulty flashlight feature.
If not, you are almost certainly dealing with a hardware problem.
If your iPhone is stillunder warranty, you might have it repaired for free.
It might also worsen the problem.
Other times the exact cause only reveals itself with the corresponding fix.
These solutions can work on any iPhone.
pop launch the Camera app and look in the upper left corner of the screen.
If the lightning bolt has a circle with a line through it, the flash is off.
Tap the icon to turn it on.
Tap which you’d like to use.
If that’s not working, check out ourNo Sound on an iPhonearticle for more help.
