Turn off proximity sensor on your iPhone

Ok I had the same, getting any object within 2 or 3 inches of the camera made it go blank, upgraded to 11.3.4 and it fixed it. However it started again a few days later.

A hard re-boot (press release up volume, pres release down volume, press & hold start button let slider come up, keep it pressed and after a few seconds the apple logo will appear, keep the button pressed until the apple logo re-appears and then release the button. After a few seconds press and release the start button) fixed it and it has not returned.

Update: turning the phone off and back on again solved things. Of course now, whether or not tracking is enabled in motion and fitness the “facedown” screen dimming doesn’t work, but I’m willing to live without it for now.

In a couple of months it may become more annoying since “facedown” is the only way to temporarily turn off Siri and I don’t want Siri on all the time, but I will need to use Siri in order to operate my phone fully hands free while driving.

Now, if only Apple and Waze were compativle for that handsfree endeavour—currently Siri stops being Apple to hear you while Waze is using the mic for handsfree operation which means you cannot receive calls or dictate anything while operating Waze.

Good luck everyone!

Hey there, this has happened to me and many customers I have seen. The fix lies in resetting all settings (settings>General>reset>reset all settings). Luckily no data will be lost but you will have to re-customize your iPhone’s settings to your specifications. Not entirely sure what triggers this issue, it’s happened to my iPhone X on several iOS versions including iOS 12 beta. Resetting all settings fixes the issue but I will say that it’s not a permanent fix, as after I’ve customized again, sometimes weeks later the proximity sensor will go mad again. I suggest getting an Apple Authorized Service Providor to replace the display if it continues as they replace the proximity sensor and all the other components near that portion during a display repair.

I had this same problem and it was very annoying, just using the phone in a normal way and passing my hand over the sensor would trigger the screen to go black. I fixed this by doing a hard reset on the phone, holding both the "power" and "home" buttons simultaneously until the Apple logo appears, then release. HTH

I had the exact same issue with my iPhone 7 Plus and it was fixed with a full reboot of the phone.

After a standard reboot no more issue, thanks all

iPhone X 11.3.1 here - restart fixed it for me.

never mind, i fixed it by shutting down my phone

I had this problem to a lesser extent while using 11.4. A simple restart cleared it right up.

Rebooting the phone worked for me

Did you restart the phone, as has been suggested about 1,000 times in this thread?

There is no setting for the proximity sensor, so changes cannot be made. Feedback to Apple goes here, https://www.apple.com/feedback/iphone.html

What are you doing at the time that is turning off when the proximity sensor is turning off the screen? I can read you are "within 3 inches of the top half of the phone", but what are you doing on the phone at the time?

The proximity sensor should be disabled except when you are on a phone call. If the screen is turning off at any other time when you are not on a call there is something else wrong, and most likely it has nothing to do with the proximity sensor. It thus has nothing to do with sensitivity. If restarting the phone doesn't fix it (Restart your iPhone, iPad, or iPod touch - Apple Support), Try restoring iOS on your phone: Restore your iOS device from a backup - Apple Support