Fix Call Sound Issues with iPhone X/8 in iOS 12 2019
Part 1: Fix Call Sound Issues with iPhone X/8 in iOS 12
Test the Front and Rear Microphones
Test the Bottom Microphone
Clean Microphone on iPhone X/8
Remove iPhone X/8 Case
Check Headphone Jack on iPhone X/8
Check iPhone X/8 Microphone Settings
Reset All Settings on iPhone X/8
Force Restart iPhone X/8
Check Restriction Applied for Microphone on iPhone X/8
Factory Reset iPhone X/8
Turn off Noise Cancellation
Fix Call Sound Issues on iPhone X/8 with Third-Party Tool
Contact Apple Support
1Test the Front and Rear Microphones
Step 1: Shoot two videos with your phone.
Step 2: Use the rear camera to take the first shot and the front camera to take the second shot.
Step 3: Play them on your phone and pay attention to the audio. If you clearly hear the audio of each video, then the particular microphone is working.

2Test the Bottom Microphone
Step 1: Launch the Voice Memos app on your iPhone.
Step 2: Record a new voice memo by pressing the red button that is displayed on the screen.
Step 3: Playback the recorded voice memo and listen carefully if you can hear the audio. If it is clear enough, then the bottom microphone is working properly.

3Clean Microphone on iPhone X/8
Sometimes, the microphone could be functioning properly but due to the presence of dust, debris or dirt that is stuck in the microphone slot which may cause sound distortion. You might even experience no sound at all because of these elements trapped in the microphone slot. To get rid of these elements you must clean the microphone slot.
Step 1: Get a dry, unused toothbrush.
Step 2: Use the toothbrush to clean the microphone grill.
Step 3: Slide the toothbrush over the microphones to get rid of the dirt.

4Remove iPhone X/8 Case
In some cases, the iPhone accessories could be the reason why you are having iPhone X microphone issues. If you suspect that the call sound issues with your iPhone could be caused by the case, you will have to remove the case and clean it.
Step 1: Apply pressure to one corner of the case and slowly pull it open. Then get a hold of another corner and do the same. This is will open the case.
Step 2: Clean the case and the area around the microphone slot.
Step 3: Return the case to its original place to cover your device.

5Check Headphone Jack on iPhone X/8
Sometimes the headphone jack could be plugged into the headphone port and it is preventing you from hearing the sound while you are on call. To check the headphone jack, do the following:
Step 1: Check the headphone port and see if the jack is inserted.
Step 2: Remove the jack by simply pulling it off the port.

6Check iPhone X/8 Microphone Settings
Another reason why you could be experiencing call sound issues with iPhone is probably the microphone settings have been changed. Microphone permission settings could be the cause of the sound issues with your iPhone. To check and solve this issue, open Settings -> go to Privacy -> tap on Microphone and enable apps to use your microphone.

7Reset All Settings on iPhone X/8
If there are errors with your iPhone audio settings, you could experience call sound issues with your iPhone. If you recently made some changes to the settings of your iPhone and after that, you started experiencing iPhone X microphone issues, then the changes you made could be the reason. You can revert to your old settings by doing a settings reset. Follow the steps below to reset all settings:
Step 1: Launch the Settings app and click on General.
Step 2: Scroll down to find Reset.
Step 3: Touch on Reset All Settings option.

8Force Restart iPhone X/8
Restarting your iPhone could also help you fix the call sound issues with your iPhone. This helps in fixing bugs and software issues that might be causing problems with your iPhone’s microphone. Do the following:
Step 1: Long press the Side button together with either of the volume buttons until you are able to see the slider.
Step 2: Drag the slider to switch off your device.
Step 3: Once the device is switched off, long press the Side button once again until you are able to see the Apple logo.

9Check Restriction Applied for Microphone on iPhone X/8
Sometimes your iPhone’s microphone could be restricted and probably that is the reason why you are having iPhone 8 microphone issues. To check this, follow this steps:
Step 1: Launch the Setting app and go to General.
Step 2: Tap Restrictions and enter the restriction passcode.
Step 3: Scroll down to find Microphone and then enable it.

10Factory Reset iPhone X/8
You can also factory reset your iPhone if you are still unable to fix the iPhone microphone issues with the following steps below:
Step 1: Launch the Settings app and touch the General app.
Step 2: Scroll down to find Reset and tap it.
Step 3: Choose the Erase all content and settings option.
Step 4: Enter your passcode
Step 5: Confirm that you want to reset your iPhone. Your device will reboot once the reset process is complete.

Note: Please backup your device in advance. After resetting, your current data will be erased and cannot be recovered.
11Turn off Noise Cancellation
iPhones come with a Noise Cancellation feature. This feature helps in reducing the surrounding noise when you make a phone call. Normally this feature is enabled by default. To fix this:
Step 1: Open the Settings app -> General -> Accessibility and then scroll down to locate the Phone Noise Cancellation option.
Step 2: Turn it off.

12Fix Call Sound Issues on iPhone X/8 with Third-Party Tool
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