How to Stop Your iPhone’s Screen from Randomly Turning On in iOS 10
After updating your iPhone to iOS 10, you may have noticed that your screen will wake up whenever you pick up the device to look at it, or even when it’s just in your pocket or dangling in your hand. This is because of a new “feature” called Raise to Wake. This feature is only available on the iPhone 6s, SE, and 7 models, and while it’s on by default, is super easy to disable.
Step 1. Navigate to Settings.
Step 2. Tap Display & Brightness.
Step 3. Toggle “Raise to Wake” off.
If you’d like to try it out again one day, just go back in and toggle it on.