Direct answer
For the Apple iPhone 11, different apps and call modes use different microphones. First, record voice memo and front/rear video, then compare normal and speakerphone calls.
What this covers
- Apple iPhone 11 (A2111/A2221/A2223)
- Apple iPhone family; connector, modem, camera, biometric and iOS eligibility vary by exact model.
- The specific fault this record addresses: microphone is quiet, muffled or not working
What it does not cover
- ×The same symptom on a different Apple product line, which has its own record and its own cited source
- ×An on-screen error code whose meaning has not been checked against this exact model's manual
- ×Live electrical, gas, sealed-system, internal battery-cell or structural repair — a technician boundary, not a self-service step
Differential
What actually causes this, and how to tell them apart
These are ordered by how often each one is the answer, not by how easy it is to try. The point of the middle column is that two causes producing the same headline symptom rarely produce the same detail — that detail is what tells you which one you have before you change anything.
- 1
A case or grip covering a microphone port
What separates it One situation fails and the others are fine — usually speakerphone or video, where a microphone away from the mouth is doing the work. A case with a misaligned cut-out, or a hand across the bottom edge, is enough.
How to confirm Remove the case, hold the phone away from your palm, and repeat the same recording. This is free and it explains a large share of these.
- 2
Lint in the microphone port
What separates it Audio has become progressively quieter or more muffled over months rather than failing suddenly. The ports are small and they live in a pocket.
How to confirm Look into the ports with a bright light. Record a voice note before and after clearing gently with a soft dry brush.
- 3
An app does not have microphone permission
What separates it It fails in one app and works in the voice recorder. Permissions are revoked by updates, by privacy settings and by users who tapped 'don't allow' months ago.
How to confirm Check that app's microphone permission specifically. This is the first thing to check when the failure is app-shaped.
- 4
A Bluetooth accessory is capturing the audio
What separates it Callers cannot hear you and the phone seems fine, with an accessory connected somewhere — often in another room or a car outside. The call's microphone is on the accessory.
How to confirm Disconnect Bluetooth entirely and repeat the call. This is a very common cause of 'nobody can hear me' with no fault anywhere.
- 5
Noise suppression removing the wrong thing
What separates it Voice sounds thin, cut off at the start of words, or drops in and out in a quiet room. Aggressive noise cancellation can misjudge a quiet speaker.
How to confirm Compare a recording in a normal room against one outdoors. Where the phone offers a voice isolation setting, changing it is the test.
- 6
Water in the port
What separates it Muffled audio after rain, a shower or a spill, improving over hours or days. Water in the mesh damps the diaphragm without damaging it.
How to confirm Leave it port-down in moving air. Do not use heat and do not use rice.
- 7
A screen protector over the earpiece microphone
What separates it Calls held to the ear are affected while speakerphone is fine. A protector that covers the top slot muffles the microphone next to it.
How to confirm Check whether the protector's cut-out lines up with the slot.
- 8
The other end of the call
What separates it One person cannot hear you and everyone else can. Call audio has two ends and a network in between.
How to confirm Call someone else, and record a voice note locally. A clean local recording exonerates the phone completely.
Before you touch a setting
Record this first — changing settings destroys the evidence
Every item below stops existing the moment a reset, re-pair or settings change is made. Written down first, they are what separates the causes above; recovered afterwards, they are guesswork.
- Which situations fail and which work: handset call, speakerphone, video recording, voice note, and one specific app. Different microphones serve different situations.
- A voice note recorded locally, which tests the microphone without the network or the other party involved.
- Whether a case, grip or screen protector is fitted, and whether its cut-outs line up.
- Whether any Bluetooth accessory is connected, including ones out of the room.
- Whether the audio is quiet, muffled, cut off at the start of words, or absent — those describe different faults.
- Whether it changed suddenly or degraded over months.
- Whether the phone has been near water recently.
Record a voice note before anything else
ReversibleThis tests the microphone alone, with no network, no other party and no call software involved. A clean local recording exonerates the microphone entirely and moves the whole investigation to the call path or one app.
Map which situations fail
ReversibleHandset call, speakerphone, video, voice note and one app use different microphones in different combinations. One failing while others work is the single most useful fact here — it identifies which microphone, and it rules out the ones that work.
Disconnect every Bluetooth accessory and retry
ReversibleA connected accessory takes the call's microphone with it, including one in another room or a car parked outside. 'Nobody can hear me' with a perfectly working phone is this more often than any hardware fault.
Remove the case and keep your hand off the bottom edge
ReversibleA case with a misaligned cut-out, or a palm across the bottom microphone, is enough to muffle speakerphone and video while a handset call stays fine. Free to test, and it explains a large share of these.
Check the app's microphone permission
ReversiblePermissions are revoked by updates and by privacy settings, and a denial made months ago is invisible now. When the failure is confined to one app, this is the first thing to check and usually the last.
Inspect the ports under a bright light
ReversibleAudio that has become gradually quieter over months rather than failing suddenly is usually lint. Clear it with a soft dry brush — never a pin, never compressed air forced into the port, never liquid — and record the same voice note again to compare.
Test the same call to a different person
ReversibleCall audio has two ends and a network between them. One person unable to hear you while everyone else can is not your phone, and no amount of work on it will change that.
Compare a quiet room against a noisy one
ReversibleAggressive noise suppression can misjudge a quiet speaker and cut the start of words or drop the voice entirely. Where the phone offers a voice isolation setting, changing it and repeating the same recording is the test.
Dry the port properly if water is involved
ReversiblePort down, in moving air, for several hours. Water in the mesh damps the diaphragm without damaging it, so this usually recovers on its own — but heat drives moisture inward and rice leaves dust exactly where it does the most harm.
Model-specific
What is true of this model and not of its siblings
Generic advice for the product line fails here. Each item below is a property of this specific model family that changes which of the steps above apply to you.
- Model scope
- A2111/A2221/A2223. Apple iPhone family; connector, modem, camera, biometric and iOS eligibility vary by exact model.
- Display
- 6.1-inch all-screen LCD with IPS technology, 1792-by-828 at 326 ppi. Control positions, reachability and how much fits on screen all change with size, so a procedure written for another model in this line will not map one-to-one onto this one.
- Chip
- A13 Bionic. The chip generation governs how long this model keeps receiving iOS updates, and it is the underlying reason an app can stop working here while running normally on a newer iPhone — a support-window matter rather than a fault.
- Connector
- Lightning. Lightning cables and adapters are not interchangeable with the USB-C iPhones and a USB-C cable will not fit at all. Lightning cables also fail internally at the strain point near either connector, which is why a cable swap is the first test for slow or intermittent charging.
- Biometric
- Face ID — face recognition, not a fingerprint reader. It refuses whenever it is not confident, so darkness, strong backlight, unusual angles and lying down all reduce it, and a case lip or a screen protector over the sensor area disables it outright.
- Camera
- 12MP Wide and Ultra Wide. A 12-megapixel main sensor produces much smaller files than the 48-megapixel iPhones, so a storage complaint on this model is less likely to be photos than it would be on a newer one.
- Storage options
- Sold in 64GB/128GB/256GB. The 64GB entry tier is the single most common cause of storage trouble on this model — a current iOS install plus a photo library leaves very little margin, and an update needs room to unpack and stage as well as to store, so it can refuse with what looks like adequate free space.
- Wi-Fi
- Wi-Fi 6 with 2x2 MIMO. This matters directly to Wi-Fi troubleshooting on this model: the generation determines which bands and features it can use, and a router running a newer standard will fall back rather than refusing — so a phone underperforming a newer sibling on the same network is often specification rather than fault.
- Bluetooth
- Bluetooth 5.0. Version differences affect range, reconnection behaviour and which accessory features are available — a newer accessory paired to an older Bluetooth version simply operates at the older one's capabilities rather than failing, which is often mistaken for a pairing fault.
- Screen brightness
- 625 nits maximum brightness (typical). Brightness is one of the largest single consumers of battery on any phone, so a model rated at a higher figure will spend more when it is actually driven to that level — and outdoor readability complaints are usually this specification rather than a display fault.
- Water resistance
- Rated IP68 — Apple specifies a maximum depth of 6 metres for up to 30 minutes under IEC standard 60529. That is a laboratory figure for a new device in fresh water; it degrades with age, drops and seal disturbance, and Apple does not warrant liquid damage.
- SIM
- Supports eSIM alongside a physical nano-SIM. An eSIM does not travel with the handset the way a plastic SIM does — a phone swap, a reset or a repair can leave the profile behind, and restoring it is a carrier action rather than a phone setting.
- Wireless charging
- No MagSafe magnet array on this model. Where wireless charging is supported it relies on alignment alone, which makes placement fussier than on the MagSafe iPhones and makes a thick case far more likely to defeat it.
- Battery rating
- Apple rates this model at up to 17 hours of video playback. Compare your own runtime against that figure and against your own history — the rating varies widely across this line and a smaller iPhone is not faulty for lasting less than a Max.
- Video recording
- 4K video recording at 24, 25, 30 or 60 fps. Frame rate and resolution are the dominant factor in how quickly video fills storage, and they are also what pushes the phone hardest thermally — sustained high-frame-rate recording is the most common cause of a camera that stops mid-take.
- Weight
- 6.84 ounces (194 grams). Worth knowing where a mount is involved: the heavier models in this line stress adhesive mounts and magnetic car holders considerably more than the lighter ones.
- Panel type
- An LCD panel rather than OLED. Dark mode saves no meaningful power here — the backlight illuminates the whole panel regardless of content — and the per-pixel dimming and true blacks described for OLED iPhones do not apply.
- Apple's own specification
- Apple publishes the full technical specification for this model at support.apple.com/en-us/111865. Where any figure above matters to a decision, that page is the authority and this one is not.
- Charging
- Supports wireless charging. Coil alignment is tighter than it looks and a thick case, a metal plate or a card in the case defeats it entirely — so wireless charging failing while cable charging works is usually the case rather than the phone.
- Platform
- iOS. Settings paths, permission models and background-execution rules differ substantially from Android, so a procedure written for an Android phone will not map onto this one screen for screen.
- Panel
- An LCD panel rather than OLED. Dark mode saves no meaningful power here — the backlight illuminates the whole panel regardless of what is displayed — and the per-pixel dimming, true blacks and always-on behaviour described for OLED models do not apply.
- Storage headroom
- Sold with a small entry tier by current standards. This is the single most common cause of storage trouble on this model: a modern OS install and a photo library leave very little margin, and an update needs room to unpack and stage as well as to store, so it can refuse with what looks like adequate free space.
- Symptom boundary
- This record covers Apple iPhone 11 when it microphone is quiet, muffled or not working. A different symptom on the same hardware, or this symptom on a different Apple product line, has its own record with its own causes and its own cited source.
Stop boundary
When this stops being a self-service repair
Continuing past any one of these costs more than the repair saves — in safety, in warranty, or in evidence a technician needs.
- !A local voice note is silent or badly distorted with the case off, the ports clear and no accessory connected — that is the microphone hardware.
- !The fault began after liquid exposure and has not improved after several days of drying.
- !The fault began after a drop, which can displace the microphone or its flex connection.
- !Every microphone on the phone fails simultaneously, which points at the audio subsystem rather than one component.
Evidence ledger
Sources behind this answer
Visible sources support the visible claims. Home Product Support records the publisher, the fact used and the review date; community reports can suggest an issue but do not become a published fact on their own.
Where the manufacturer's article stops. Apple Support publishes this as "If the microphones on your iPhone aren't working". Apple's microphone article for iPhone; the iPad equivalent is a separate article and is mapped separately. Probed 2026-08-23: title-verified. What that article does not carry is the model boundary — it is written for a product line, and A2111/A2221/A2223 is the scope applied here. Where a control label, terminal, indicator pattern or reset sequence differs on your unit, the manual for that exact model is the authority, not this page and not the article.
Exact questions
Common follow-ups
What size is the iPhone 11 screen?+
6.1-inch all-screen LCD with IPS technology, at 1792-by-828 at 326 ppi. That matters more than it sounds — a procedure written for a different size in the same line puts controls in different places, and gestures that depend on reach behave differently.
Does the iPhone 11 use USB-C or Lightning?+
Lightning. A USB-C cable will not fit at all, which is the usual explanation when a charger that works on a newer iPhone in the same household does nothing here. Lightning cables also fail internally at the strain point, so a cable swap is the first test for slow or intermittent charging.
Does the iPhone 11 have Face ID or Touch ID?+
Face ID. It is deliberately quick to refuse when not confident, which is why darkness, strong backlight, unusual angles and lying down all reduce it — and why a case lip or a screen protector over the sensor area disables it entirely.
What chip does the iPhone 11 have?+
The A13 Bionic. This determines how long the model keeps getting iOS updates, and it is the reason an app can drop support for this iPhone while running fine on a newer one — a support-window matter rather than a fault to troubleshoot.
How much storage does the iPhone 11 come with?+
64GB/128GB/256GB. The 64GB tier is the single most common cause of storage trouble on this model, and it is why an update can refuse with what looks like enough space free — installation needs room to unpack and stage as well as to store.
Is the iPhone 11 waterproof?+
No — water resistant, rated IP68, which Apple specifies as a maximum depth of 6 metres for up to 30 minutes under IEC standard 60529. That is a laboratory figure for a new device in fresh water; it degrades with age, drops and seal disturbance, and liquid damage is not warranted.
Does the iPhone 11 support eSIM?+
Yes, alongside a physical nano-SIM. Bear in mind that an eSIM does not move with the handset the way a plastic SIM does — a phone swap, a reset or a repair can leave the profile behind, and restoring it is a carrier action.
What Wi-Fi standard does the iPhone 11 support?+
Wi-Fi 6 with 2x2 MIMO. That is worth knowing before blaming the phone for slower Wi-Fi than a newer device on the same network — a router running a newer standard falls back to what the phone supports rather than refusing it, so the difference is specification rather than fault.
What Bluetooth version does the iPhone 11 have?+
Bluetooth 5.0. Version affects range, reconnection behaviour and which accessory features are available. A newer accessory paired here operates at this version's capabilities rather than failing, which is regularly mistaken for a pairing fault when the accessory simply cannot do everything it does on a newer phone.
How bright is the iPhone 11 screen?+
625 nits maximum brightness (typical). Brightness is among the largest single consumers of battery, so outdoor use at full brightness costs real runtime — and poor outdoor readability on this model is usually this figure rather than a display fault.
How long should the iPhone 11 battery last?+
Apple rates it at up to 17 hours of video playback. Judge your runtime against that figure and your own history rather than against a different iPhone — the rating varies widely across this line.
What video can the iPhone 11 record?+
4K video recording at 24, 25, 30 or 60 fps. Resolution and frame rate are the dominant factor in how fast video fills storage, and they push the phone hardest thermally — sustained high-frame-rate recording is the most common reason a camera stops mid-take.
Does dark mode save battery on the iPhone 11?+
Not meaningfully. This model uses an LCD panel, which backlights the whole screen regardless of what is displayed. Dark mode only saves real power on the OLED iPhones, where black pixels are switched off entirely.
Nobody can hear me on calls.+
Check for a connected Bluetooth accessory first — including one in another room or a car outside. A connected accessory takes the call's microphone with it, and the phone gives almost no indication that it has. This is more common than any hardware fault.
How do I test the microphone by itself?+
Record a voice note. That uses the microphone with no network, no other party and no call software involved. A clean recording exonerates the microphone completely and tells you the problem is in the call path or in one app.
It works on speakerphone but not on a normal call.+
Those use different microphones. A handset call uses the one near your mouth at the bottom, or the one by the earpiece; speakerphone uses a different combination. One working and the other not localises the fault precisely — and a screen protector over the top slot is a common cause.
My voice sounds muffled to other people.+
Two usual causes: something covering the port, or lint inside it. Take the case off, keep your palm off the bottom edge, and look into the ports with a bright light. Gradual degradation over months is lint; sudden onset is usually the case or an accessory.
It fails in one app only.+
Check that app's microphone permission. Permissions are revoked by updates and privacy settings, and a 'don't allow' tapped months ago is invisible now. The hardware is fine, since it works elsewhere.
The start of my words gets cut off.+
That is usually noise suppression misjudging a quiet speaker rather than a hardware fault. Compare a recording in a normal room against one outdoors, and change the voice isolation setting if your phone offers one.
How do I clean the microphone port?+
A soft dry brush, gently, with the phone powered off. Never a pin — the mesh is delicate and pushing debris through it is worse than leaving it. Not compressed air forced into the port, and nothing liquid.
It got muffled after I was caught in the rain.+
Water in the mesh damps the diaphragm without damaging it, and it usually recovers. Leave the phone port-down in moving air for several hours. Do not apply heat, which drives moisture further in, and do not use rice, which adds dust to the problem.
Only one person says they cannot hear me.+
Then it is very probably not your phone. Call audio has two ends and a network between them, and a single affected contact points at their end or the route. Test with someone else and record a local voice note to confirm.
Does this answer apply to every Apple model?+
No. It is scoped to A2111/A2221/A2223. Apple iPhone family; connector, modem, camera, biometric and iOS eligibility vary by exact model.
What should I record before troubleshooting microphone or can't hear me?+
Record the complete model identifier, exact message or indicator, software/firmware where visible, the operating stage and what still works.
Why is a factory reset not the first step?+
A reset can erase accounts, networks, maps, schedules or preferences without distinguishing microphone, can't hear me. The ordered checks preserve that evidence.
When should I stop and use qualified service?+
Do not insert tools or liquid into microphone openings.
Answer for the exact device and software version shown above.