People Can't Hear You on Calls? How to Fix a Phone Microphone (iPhone & Android)

You're on a call and the other person keeps saying "you're breaking up," "you sound far away," or "I can't hear you at all" — yet you can hear them perfectly. It's one of the most frustrating phone faults because everything looks normal on your end, and it's easy to assume the microphone has died and the phone needs a repair. Most of the time it hasn't. The usual culprits are a case or screen protector covering a tiny microphone hole, a bit of pocket lint packed into that hole, an app that lost microphone permission, or a Bluetooth earbud quietly stealing the audio — all free to fix in a couple of minutes once you know which one it is.

This guide is for a phone whose microphone seems to fail — callers can't hear you, your voice is muffled or robotic, voice memos and Siri/Google Assistant don't pick you up — on iPhone and Samsung/Android. A couple of close neighbours are worth pointing to first so you're in the right place: if calls drop or won't connect at all and you see "No Service" or "SOS only," that's a signal problem, not a mic — see our no-service guide; if the mic only fails in Zoom or Teams on a computer, see our computer-microphone guide; and if all this started after the phone got wet, start with our dropped-phone-in-water guide. Here we'll show you how to tell which microphone is failing and whether it's software or hardware, the free fixes in order, and when a dead mic really is a repair. We sort out phone microphones across Southern California and the Coachella Valley every week.

The 30-second test: which microphone is actually failing?

Here's the thing the "10 quick fixes" lists skip: your phone doesn't have one microphone, it has three, and which one is broken tells you a lot. There's a bottom microphone next to the charging port (it handles normal handset calls, Siri/Google Assistant, and voice memos), a top/front microphone up by the earpiece and selfie camera (used for speakerphone and FaceTime/video calls), and a rear microphone by the back cameras (used when you record video). Because different situations use different mics, you can pin down the fault by changing how you talk.

Run this quick comparison. Make a normal call held to your ear and ask if they can hear you; then tap the speaker button and ask again. If you're clear on speakerphone but muffled or silent held to your ear, the bottom mic is the suspect. If it's the opposite — fine to your ear but bad on speaker or on a video call — the top mic is the suspect. Then run your phone's built-in self-test, which is the cleanest way to take the other person out of the equation. On iPhone, open Voice Memos, tap record, speak normally near the bottom of the phone, stop, and play it back — Apple uses this exact test; if your voice is clear, the bottom mic is fine and the problem is app-side or on the call. On Samsung, the Samsung Members app has a built-in microphone test (open Samsung Members > Diagnostics > Phone diagnostics > Mic, or Support > View tests) that records you and tells you pass or fail; the plain Voice Recorder app works as a quick stand-in too. If the self-test sounds clear but callers still can't hear you, you're looking at a setting or an app, not a broken microphone — start with the free fixes below.

Start here: the free fixes that solve most cases

Two physical things block more microphones than any actual fault, so check them first. The case and screen protector: a new or thick case, or a stick-on screen protector or film, can sit right over a microphone opening and muffle it — both Apple and Samsung tell you to take the case and any film off and test again. The mic hole itself: that pinhole by the charging port collects pocket lint and dust that pack down against the microphone and choke it. Shine a flashlight along the bottom edge; if you see fuzz, clean the outside of the opening gently with a dry soft-bristled brush or the corner of a clean dry cloth. Don't jam a pin, paperclip, or anything metal into the hole — you can push the debris deeper or puncture the mesh behind it. With the case off and the hole clean, retest with the Voice Memos / Voice Recorder check above.

If that doesn't do it, three more free checks. Restart the phone — a simple reboot clears the temporary glitch behind a large share of "nobody can hear me" cases, and it's the single most effective quick fix, so don't skip it because it sounds too obvious. Check you're not simply muted or covering the mic: on a call, make sure the on-screen Mute button isn't lit, and notice whether your hand or a finger is over the bottom edge when you hold the phone, especially in landscape for videos. And turn Bluetooth off and test: a forgotten earbud in a bag, a smartwatch, or a car kit can grab the call audio so your phone is listening through a dead or distant accessory mic instead of its own — toggling Bluetooth off (or removing the earbuds from your ears) instantly rules that out. Finally, install any pending software update (Settings > General > Software Update on iPhone; Settings > Software update on Android), since a microphone bug introduced by one update is often fixed by the next.

Muted in just one app? Check microphone permissions

A very common version of this problem is one where regular phone calls are fine but a specific app — WhatsApp, Zoom, Instagram, your bank's voice verification, a game — can't hear you. That's almost never a hardware fault; it's that the app doesn't have permission to use the microphone. On iPhone, go to Settings > Privacy & Security > Microphone and make sure the switch is on for that app. On Android, open Settings > Privacy (or Security & privacy) > Permission Manager > Microphone, or Settings > Apps > [that app] > Permissions, and allow the microphone there. If permission was off, flipping it on usually fixes that app immediately.

If the microphone fails across several apps after you recently installed something, a misbehaving third-party app may be hijacking the mic. On Samsung you can test this cleanly by booting into Safe Mode (press and hold the power-off option until "Safe mode" appears), which runs only the phone's built-in apps — Samsung's own guidance is that if the microphone works in Safe Mode, a downloaded app is the cause, so restart normally and uninstall whatever you added most recently. iPhone has no Safe Mode, so there the equivalent is to think about what changed: a recently installed call-recording, voice-changer, or "call screening" app is the usual offender, and removing it restores the mic.

When it's hardware — and what the repair is

If the case is off, the hole is clean, permissions are on, Bluetooth is off, and the phone's own self-test still records you as silent or badly muffled, you're most likely into hardware — and there are a few classic tells. The biggest one is water: a microphone that went muffled, scratchy, or dead after the phone got wet is usually corrosion on the mic or its connector, even days later (see our water guide for that path). A drop can do it too, by jarring loose the thin flex cable the microphone sits on. And on many phones the bottom microphone is built onto the same charging-port flex assembly as the USB-C/Lightning port, which is why a mic that quit around the same time the phone started charging poorly often points at that one shared part.

The fix in these cases is a microphone or charging-port-flex replacement — a standard, well-understood phone repair, almost always far cheaper than replacing the phone, and usually done in well under an hour. One thing to check before you pay: if the phone is under its manufacturer warranty or AppleCare+/Samsung Care+ and the microphone failed on its own with no drop and no liquid contact, the repair may be covered — contact Apple or Samsung first, because a covered repair is a free repair (they'll inspect for physical or liquid damage, which can disqualify a claim). Out of coverage, the decision is the same repair-or-replace math as a cracked screen, and our Phone & Tablet Repair Calculator gives you a ballpark in about a minute.

How we can help

If people can't hear you, start by finding which microphone is failing: compare a normal call to speakerphone, then run the built-in self-test (Voice Memos on iPhone; the Samsung Members mic test or Voice Recorder on Android). If the self-test records you clearly, the mic works and the problem is a setting — take off the case and any screen protector, clean lint out of the bottom hole, restart, turn Bluetooth off, make sure you're not muted, and check microphone permissions for the app that can't hear you. If the self-test comes back silent or muffled — or the trouble started after a soaking or a drop — it's the microphone or its flex cable, and no setting will fix that; if you're under warranty or AppleCare+/Samsung Care+, claim it there first.

When it's out of coverage, or you'd rather not deal with a mail-in process, that's what we do. We diagnose and repair dead, muffled, and water-damaged phone and tablet microphones — iPhone and Samsung/Android — across Southern California and the Coachella Valley, we'll confirm whether it's software or hardware before you spend a cent, and because we don't profit from selling you a new phone, we'll tell you straight when an older device isn't worth the repair. Our Phone & Tablet Repair Calculator gives you a ballpark first if you'd like to sanity-check the cost.