It's dark and you need to be able to see. It's fine — whip out your trusty Android phone and get the camera flash to work as a flashlight. Here's how to do it
Honestly, this couldn't be simpler than it's merely a toggle away on pretty much all Android phones. First, pull down the notification shade. Then find the flashlight icon and tap it.
Left: Off; Right: On
Really, thats it! If you find the flashlight icon, you may need to display the notification panel for a second time to display the entire Quick Settings menu. At that point, you should see the flashlight
Now that you've found the flashlight, however, let's go ahead and eliminate that second tap by moving the flashlight icon to the top row of the Quick Settings panel.
On Samsung Galaxy phones, press the three dots in the upper right corner, then choose "Button Order."
From there, drag and drop any icons into your preferred spot, making sure to move the flashlight icon closer to the front of the list. From that point forward, it'll be little more than a swipe-and-tap away.