Here are tips to fix your iPhone’s microphone problems: 1. Clean it with a Toothbrush. Those tiny dust particles sticking in your device’s microphone can be the reason for a muffled voice output on calls. You can clean your iPhone’s microphone using a clean toothbrush or an air compressor. But, be careful about the flow of the compressed Locate the SIM card tray. The SIM card tray is located on the right side of the device. Note: The device uses a Nano-SIM card. Locate the Lightning connector port. The Lightning connector port is located on the bottom of the device. Get Apple iPhone XR support for the topic: Device Layout. Find more step-by-step device tutorials on att.com. To turn off your iPhone, press and hold the power button until slide to power off appears on the display. If you have an iPhone with Face ID, simultaneously press and hold the side button and either volume button until the same slider appears. Then, swipe the slider from left to right to turn off your iPhone. Wait a few seconds, then press and Take a look at the bottom of the iPhone. There you will see that on the bottom edge of your phone, there’s a series of holes in it. Just behind those holes is where the microphones are located. There are two different microphones located on both sides of The lightning connector. Locate the SIM card tray. The SIM card tray is located on the bottom right side of the device. Note: The device uses a Nano-SIM card. Locate the connector port. The USB-C connector is located on the bottom of the device. Note: Apple iPad Pro 11-inch (2021) and Apple iPad Pro 12.9-inch (2021) include the Thunderbolt USB4 port. When you plug an external microphone into your iPhone, FiLMiC Pro should automatically select it and disable the iPhone’s internal microphones. Audio setting page in FiLMiC Pro. To double-check, you can go into your audio settings. The Microphone Selector should show that the “Headset Microphone” is selected. Step 1: Press hold the Power button until the Slide to Power off appear. Step 2: Now drag the slider to turn off your iPhone completely. Step 3: Wait for about 30 seconds then press and hold the Power button again until the Apple logo appears. You can now allow your phone to boot up and check if the iPhone is working. 2. Posted: May 19, 2020. Options. It can be replaced. It's part of the power button, flash/flashlight and Microphone. You can purchase it from union repair for 32 dollars plus freight which is around 30 dollars and you are looking at about 5 day normally but expect longer shipping times because of the virus. It is shipping from Hong Kong. XVHLCt.