How to Change Your iPhone’s Sleep Mode If Your Screen Dims Too Fast

Tired of your screen going dim while your trying to watch Netflix? Do you want to read a lengthy article without constantly having to wake up your iPhone or iPad? This article will teach you how to turn off the auto-brightness feature in iOS 11 and take control over when your iOS device goes to sleep. Read on to find out how to turn off auto-lock and auto-brightness in iOS 11.

In iOS 11, Apple bravely hid the controls for toggling auto-brightness on or off. This has proven to be an annoyance to users who prefer to control the appearance of their screen, especially when the iPhone is being used for entertainment purposes. We've uncovered the lost controls for both auto-lock and auto-brightness so that you don't have to dig.

Master your iPhone in one minute a day:

Sign up to iPhone Life's Tip of the Day Newsletter and we'll send you a tip each day to save time and get the most out of your iPhone or iPad.

How to Turn Off Auto-Brightness

The Auto-Brightness toggle used to appear under the Display and Brightness settings but was moved in the iOS 11 update. To turn off the auto dim feature in iOS 11, follow these steps:

  • Open Settings
  • Tap General
  • Tap Accessibility

  • Tap Display Accommodations
  • Toggle Auto-Brightness to turn the feature off

You can turn this feature back on at any time by following the steps above and toggling Auto-Brightness to the off position.

How to Turn Off Auto-Lock

In addition to going dim, your iOS 11 device is set to automatically lock after one minute. While this particular setting won't affect your Netflix viewing, it will affect your reading. If you don't want to have to continuously tap your screen to keep the device from locking while you read the morning paper, then you might prefer to turn off auto-lock or at least delay the feature. Here's how to turn off or delay auto-lock:

  • Open Settings
  • Tap Display & Brightness
  • Tap Auto-Lock


  • Set the lock feature to a time which works for you. The timer goes anywhere from 30 seconds to 5 minutes to Never. Keep in mind, if you set your iPhone to Never Auto-Lock then you'll want to avoid accidentally leaving your screen on and running out the battery.

That's how you turn off Auto-Lock and Auto-Brightness in iOS 11 to avoid having your screen go dim automatically. Now you can enjoy your movie viewing and book reading without all the hassle. Hopefully iOS 12 will consolidate the controls again, but for now, it's good to know that the controls aren't gone, they just take a bit more work to access.

Top image credit: sergey causelove /

Master your iPhone in one minute a day: Sign up here to get our FREE Tip of the Day delivered right to your inbox.

Rich Hall has written about Handheld and Pocket computers for the last 13 years. He is the Editor of Pocket PC magazine and former editor of The HP Palmtop Paper, the NEC Ultralite Connection and the HP Portable Paper. He began his career as a high school Math and English teacher. Rich lives in Fairfield, Iowa, with his wife, Lucinda, and their children, Robert and Ella. You can contact him at