Caller Can’t Hear Me? Microphone and Call Audio Fixes

“Hello? Hello? I can’t hear you.” When the caller can’t hear you, or hears you muffled, broken up or robotic, the cause could be a blocked microphone hole, a Bluetooth headset quietly grabbing the audio, a network setting or a software bug. A few simple tests usually narrow it down in about five minutes.

Five tests that point to the culprit

1. Record a voice memo in Voice Memos (iPhone) or the voice recorder app (Android) and play it back. If it’s clear, the main mic works and the problem is specific to calls.
2. Record a short video with the front camera and then the rear one. That checks the other microphones.
3. Make one normal call and one on speakerphone. If they hear you on speaker but not normally, or the other way round, one particular mic is at fault.
4. Compare a cellular call with WhatsApp, FaceTime or another VoIP call. If only one type fails, look at the network or the app.
5. Call someone else on a different network. The problem may be at their end.

Where your voice gets lost

Your phone has several microphones: usually one at the bottom for calls, one near the earpiece or top for noise cancelling, and one by the cameras for video and speakerphone. During a call, software picks which to use and how to filter the sound. Your voice goes missing when a mic hole is blocked by dust, lint, a case or a screen protector, or when the audio is routed to a Bluetooth device such as earbuds sitting in their case, the car or a smartwatch. For VoIP apps, another app may have taken the microphone or the permission may be off. Then there’s the network (weak signal, or VoLTE or Wi-Fi Calling problems with your carrier), software bugs that often follow an update, and hardware: a damaged mic, liquid, or a poor repair.

Fixes that work on any phone

1. Take off the case and screen protector. Plenty of them partly cover a mic hole.
2. Clean the mic holes gently with a soft, dry brush. Don’t push pins or needles in, because you can puncture the mic’s mesh.
3. Switch Bluetooth off and make a test call. If it works now, a headset, car or watch was taking the audio.
4. Restart.
5. Toggle VoLTE and Wi-Fi Calling. Turn Wi-Fi Calling off if the Wi-Fi is poor, and switch VoLTE/4G calling off and on to refresh it.
6. Update the phone and the carrier settings.

On a dual-SIM phone, check which line is making the call. If one SIM or eSIM has weak coverage or no VoLTE where you are, calls on that line can break up while the other line is fine. Change the default line for calls in Settings and try again. If it only happens with one carrier, ask them to refresh your line’s provisioning. A stale VoLTE profile on the network side is a common cause of one-way audio.

iPhone: routing, Mic Mode and calling settings

1. During a call, tap the audio button and make sure iPhone is selected, not AirPods or the car.
2. Still in the call, open Control Center and tap Mic Mode. Standard or Voice Isolation work best for calls; Wide Spectrum lets background noise in.
3. For WhatsApp, Teams and similar apps, go to Settings › Privacy & Security › Microphone and switch the app on.
4. Try Settings › Cellular › Cellular Data Options › Voice & Data (LTE or 5G with VoLTE on), and Settings › Cellular › Wi-Fi Calling.
5. Update iOS in Settings › General › Software Update. Carrier updates appear in Settings › General › About.
6. Reset network settings: Settings › General › Transfer or Reset iPhone › Reset › Reset Network Settings.
7. Apple Support, or the Apple Support app, can run remote audio diagnostics on your iPhone.

Android: the mic records fine but not on calls

1. Check permissions in Settings › Apps › [Phone or VoIP app] › Permissions › Microphone › Allow, and check the microphone privacy toggle in quick settings or Settings › Security & privacy › Privacy.
2. On Samsung, try the in-call Voice focus or noise reduction options both on and off.
3. Toggle VoLTE and Wi-Fi Calling: Settings › Network & internet › SIMs › [your SIM] on a Pixel, Settings › Connections › Mobile networks on Samsung.
4. Test in Safe Mode. If calls work there, a third-party app such as a call recorder, voice changer or VPN is interfering.
5. Run the hardware tests. On Samsung, dial *#0*# and use Receiver, Speaker and the mic tests, or go to Samsung Members › Support › Phone diagnostics. Other brands are in our Android diagnostic codes list.
6. Reset network settings: Settings › General management › Reset on Samsung, Settings › System › Reset options on a Pixel.

Crackling, quiet speakerphone and noisy VoIP calls

VoIP noise on Pixels. Google’s October 2026 Pixel update (security patch level 5 October 2026) fixed “audio noise or distortion during certain VoIP calls” on Pixel 8 through Pixel 10, according to TechRepublic. It’s a phased rollout, so check Settings › System › Software updates and install it when it appears.

A crackling earpiece. If the other person sounds crackly, the earpiece speaker or its mesh may be blocked or damaged. Clean the grille gently and test the speaker with a video. Some owners of newer budget and mid-range phones have described constant crackling earpiece audio on brand-new phones, an Honor 400 Pro buyer on a consumer complaints site among them. If it happens from day one, return or exchange the phone under warranty instead of troubleshooting for weeks.

They can’t hear you on speakerphone. Speakerphone usually uses a different mic, often beside the cameras. Take the case off, clean that hole, and put the phone face-up on a hard surface rather than face-down or on a soft sofa. If speakerphone is too quiet for you, turn the volume up during the call, clean the speaker grille, and check Settings for volume limits or Adaptive Sound.

Testing calls on a used phone

Before you pay for a second-hand phone, make a normal call, a speakerphone call and a video recording on it. Ask the person you called how you sound, record a voice memo, and run the diagnostic tests. Check the IMEI for blacklist and carrier lock status as well.

Booking a microphone repair

If voice memos are still silent or muffled with the case off and the holes clean, or the hardware test fails, the microphone or its flex cable needs replacing. A mic fault without liquid or impact damage is normally a warranty job, so check before you pay:

• Run a free All-in-one Basic Info check to confirm the model and warranty.
• If calls fail on only one carrier, a carrier and SIM-lock check shows whether the phone is locked to a network.
• For repair and replacement history, use a full GSX report on an iPhone, a Samsung Info report on a Galaxy, or a Google Pixel Info check on a Pixel.