Secret Codes guide

iPhone Callers Say They Cannot Hear You: How to Fix It

By Muhammad Shahid · 4 November 2026 · 5 min read

Quick answer

Isolate a blocked microphone from a network problem. iPhone has several microphones. The one at the bottom carries your voice on a normal handset call; the ones near the top and rear are used on speakerphone and for video.

Secret CodesDial codes, SIM & network test · Free on the App StoreDownload free →

Key facts
What it does	Isolate a blocked microphone from a network problem.
Published for	any iPhone
Type	iOS setting

Isolate a blocked microphone from a network problem. This page explains what it does, how to use it on an iPhone and which carriers it applies to.

I build Secret Codes: IMEI & Carrier, a free iPhone app with 317 checked codes and guides, including this one. If you would rather tap than memorise, get Secret Codes on the App Store.

Why does this happen and how do I fix it?

iPhone has several microphones. The one at the bottom carries your voice on a normal handset call; the ones near the top and rear are used on speakerphone and for video. Testing them separately tells you whether the hardware is at fault or whether the call audio is being lost in the network.

The most common cause is not a fault at all — a case, a screen protector or pocket lint covering a microphone port. The second most common is a specific app being denied microphone permission, which produces silence in that app while calls are fine.

If both the recording tests come back clear and people still cannot hear you on calls, the microphone is working and the problem lies with the voice path: the call leg, the codec, or a weak uplink.

What should I try, in order?

Remove the case and any screen protector or film, and clear debris from the openings. This is Apple's first step and it fixes a large share of cases.
Test the call microphone: open Voice Memos, record while speaking at the bottom of the phone, and play it back. Your voice should be clear.
Test the speakerphone microphones: open Camera, record a video while speaking at the top of the phone, switch to the other camera and record again. Play both back.
If only one app is affected, check Settings, Privacy & Security, Microphone and confirm that app is enabled.
If the recordings are clear but callers still cannot hear you, the microphone is fine — turn on Wi-Fi Calling and test again, since a weak uplink degrades your outgoing audio first.
If a recording is silent or muffled, the microphone needs service. Book an appointment rather than resetting settings.

Which carriers does this apply to?

Published for	any iPhone
Type	iOS setting
Good to know	The tests below are Apple's own. They separate a hardware fault from a network fault before you spend time on either.

Secret Codes code detail with Open in Phone button — The Secret Codes detail screen shows the steps, the carriers and an Open in Phone button.

See all fix iphone phone problems or every category of iPhone codes.

How Secret Codes helps

Secret Codes keeps this and every other entry a search away. Pick your carrier once and each entry says whether it is published for your line. You can save favourites, add a private note, and record whether a code worked on your line.

Frequently asked questions

What should I do about Callers Say They Cannot Hear You?

What else should I know about Callers Say They Cannot Hear You?

Testing them separately tells you whether the hardware is at fault or whether the call audio is being lost in the network. The most common cause is not a fault at all — a case, a screen protector or pocket lint covering a microphone port.

What are the steps for Callers Say They Cannot Hear You?

1. Remove the case and any screen protector or film, and clear debris from the openings. This is Apple's first step and it fixes a large share of cases. 2. Test the call microphone: open Voice Memos, record while speaking at the bottom of the phone, and play it back. Your voice should be clear. 3. Test the speakerphone microphones: open Camera, record a video while speaking at the top of the phone, switch to the other camera and record again. Play both back. 4. If only one app is affected, check Settings, Privacy & Security, Microphone and confirm that app is enabled. 5. If the recordings are clear but callers still cannot hear you, the microphone is fine — turn on Wi-Fi Calling and test again, since a weak uplink degrades your outgoing audio first. 6. If a recording is silent or muffled, the microphone needs service. Book an appointment rather than resetting settings.

Where do I find Callers Say They Cannot Hear You?

Mostly in the Settings app, following the steps on this page in order.

Is there a dial code for Callers Say They Cannot Hear You?

No keypad code is listed for it. The way to do it is: Fix.

Which carriers does Callers Say They Cannot Hear You work on?

It is published for any iPhone. The tests below are Apple's own. They separate a hardware fault from a network fault before you spend time on either.

Does Callers Say They Cannot Hear You work on Android phones too?

These steps are for iPhone. Android phones have their own menus.

Will Callers Say They Cannot Hear You work outside the US?

The iPhone steps stay the same, although some features depend on your carrier and region.

What if Callers Say They Cannot Hear You does not work on my iPhone?

Check that it applies to your carrier first, because carriers decide which services they offer and can change them. If it should apply to your line, contact your carrier.

What is related to Callers Say They Cannot Hear You?

Battery Drains Fast In Poor Signal. Why one bar of signal empties the battery so quickly.

What else is in this category?

You Cannot Hear The Caller. Separate a blocked earpiece from a bad connection.

Can I find Callers Say They Cannot Hear You in an app?

Yes. Secret Codes, a free iPhone app, includes it with its steps and carrier details.

Sources

Secret CodesDownload free