Troubleshooting Guide for the Proximity Sensor Not Working on iPhones

Authored by: Support.com Tech Pro Team

Fixing the Proximity Sensor on iPhone

Encountering issues with the proximity sensor on your iPhone can disrupt key functions such as screen turning off during calls or the automatic adjustment of screen brightness. Here's a comprehensive troubleshooting guide to help you address problems with the proximity sensor not working on your iPhone:

Clean the Proximity Sensor Area:

Dust, dirt, or smudges on or around the proximity sensor can lead to inaccurate readings. Gently clean the area around the sensor using a soft, lint-free cloth.

Remove Screen Protectors or Cases:

Screen protectors or cases may interfere with the proximity sensor's functionality. Remove any accessories that might be obstructing the sensor and test whether the issue persists.

Restart Your iPhone:

Start by performing a simple restart. This can often resolve temporary software glitches affecting the proximity sensor.

Check for Software Updates:

Apple frequently releases software updates that address bugs and improve hardware functionality. Ensure your iPhone's operating system is up to date:

Go to "Settings."

Scroll down and tap "General."

Select "Software Update" to check for updates.

Calibrate the Proximity Sensor:

Calibrating the proximity sensor can sometimes resolve inaccuracies:

Dial *3001#12345#* in the Phone app and press the call button. This will enter Field Test mode.

In Field Test mode, place a call to a number with an automated system (e.g., voicemail).

When the call is connected, press the power button to lock the screen.

Wait for a few seconds and press the power button again to wake the screen.

End the call to exit Field Test mode.

Test in Safe Mode:

Testing the proximity sensor in Safe Mode helps determine if a third-party app is causing the issue:

Press and hold the "Side" button until the power-off slider appears.

Press and hold the "Volume Down" button until the device restarts in Safe Mode.

Test the proximity sensor while in Safe Mode.

Exit Safe Mode by restarting your iPhone.

Reset All Settings:

If none of the above steps work, resetting all settings may help resolve the issue without erasing your data:

Go to "Settings."

Scroll down and tap "General."

Select "Reset" > "Reset All Settings."

Restore iPhone:

If the problem persists, restoring your iPhone to its factory settings may be necessary. Make sure to back up your data before proceeding:

Connect your iPhone to a computer and open iTunes (macOS Catalina and later) or Finder (macOS Mojave and earlier).

Select your device when it appears in iTunes or Finder.

Choose "Restore iPhone" and follow the prompts.

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