Galaxy S24 No Sound During Calls? 10 Fixes That Actually Work (2026)

If your Samsung Galaxy S24, S24+, or S24 Ultra has no sound during calls — either the earpiece is silent, the caller can’t hear you, or the audio suddenly drops mid-conversation — the problem is almost always one of five things: a muted in‑call volume slider, a non‑normal equalizer preset, a clogged earpiece mesh, a One UI 7/8 audio‑routing regression, or a Bluetooth device that the phone is stubbornly trying to route through. Hardware failure is at the bottom of that list, not the top.

This guide walks through the ten fixes that resolve the issue for roughly 95% of S24 owners, in the order you should try them. Start at the top and stop when audio returns. Every step uses the exact menu path in One UI 7.1/8 as of April 2026.

Quick Fix Table: Match Your Symptom

Symptom	Most Likely Cause	Jump To
Earpiece totally silent, speakerphone works	In‑call volume slider at 0	Fix 1
Audio very quiet, can’t hear in a noisy room	Equalizer set to Bass Boost / Soft / Clear	Fix 2
Caller says I sound muffled or far away	Bottom‑mic mesh clogged with lint	Fix 4
No sound only on Bluetooth headset	HFP profile or separate‑app sound routing	Fix 6
No sound after installing One UI 7 / 8	Known One UI regression — clear Phone cache	Fix 5
Audio cuts out mid‑call	Wi‑Fi Calling handover failure	Fix 7
Everything fails — still no sound	Earpiece hardware fault	Fix 10

Fix 1 — Raise the In‑Call Volume With the Side Keys (While Actually On a Call)

The S24 uses a separate volume channel for voice calls that is invisible from the Settings app until a call is active. If you adjusted ringtone or media volume and assumed call volume followed, it didn’t.

Place or receive a call (calling your own voicemail works for testing).
While the call is connected, press the Volume Up key on the left side.
A Call volume slider appears. Drag it to 100%.
Tap the three‑dot menu in the call screen, then Settings → Ringtone and keypad tones → Call volume and confirm it’s at max there too.

If the slider is missing entirely, you’re on a VoLTE call that lost its audio channel. Hang up, toggle Airplane Mode on for 10 seconds, toggle off, and call again.

Fix 2 — Set the Equalizer Back to Normal

Samsung’s Sound Quality & Effects menu ships with an Equalizer that defaults to Normal. Any other preset (Bass Boost, Soft, Dynamic, Clear, Treble Boost) applies a filter that audibly cuts call‑band frequencies on the S24’s bottom speaker and earpiece. Multiple Samsung Community threads confirm this is the single most common “my S24 got quiet” complaint.

Go to Settings → Sounds and vibration → Sound quality and effects.
Tap Equalizer.
Select Normal.
Below it, turn off UHQ upscaler and Adapt sound (both interfere with voice codecs).

Place a test call. If you had been using a non‑Normal preset, the loudness jump is immediately obvious.

Fix 3 — Turn On “Boost Sound During Phone Calls”

One UI includes a built‑in call amplifier that most owners have never enabled. It adds roughly +6 dB to the earpiece during calls only, without affecting media playback.

Open Settings → Accessibility → Hearing enhancements.
Toggle on Boost sound during phone calls.

There is no separate volume slider — once it’s on, the regular in‑call Volume Up key pushes past the previous ceiling. This alone fixes the “I can hear fine outside but not in a car or restaurant” variant of the problem.

Fix 4 — Clean the Earpiece and Bottom Microphone

The S24’s earpiece slit and bottom‑edge primary microphone sit behind a fine mesh that traps pocket lint, dead skin, and foundation makeup within weeks. Samsung’s official guidance is to use a dry, soft‑bristled brush — not compressed air, which can push debris deeper or blow moisture past the mesh.

Power the phone off.
Use a soft nylon or anti‑static brush. Brush the earpiece slit (above the screen) and the primary mic pinhole (on the bottom edge, to the left of the USB‑C port) in one direction only.
For stubborn buildup, wrap a tiny piece of masking tape sticky‑side‑out around a toothpick, gently press it against the mesh, and lift.
Do not insert needles, pins, or SIM ejector tools — the mesh tears and the speaker underneath is then permanently exposed to dust.

A pack of soft‑bristle phone‑port brushes is inexpensive: Phone Speaker Cleaning Kit (13‑piece) on Amazon. Links should be spot‑checked before publishing in case the listing has moved.

After cleaning, call your voicemail and leave a short message, then play it back. A muffled recording means the mic is still obstructed; a clear recording means the cleaning worked.

Fix 5 — Clear the Phone App’s Cache and Data

One UI 7 (rolled out to S24 in April 2025) introduced a regression where the stock Phone app’s cached call profile occasionally points to a stale audio endpoint, producing silent calls even though the radio is connected. Clearing the cache rebuilds the profile on the next call.

Settings → Apps → Phone → Storage.
Tap Clear cache.
Place a test call. If audio is still missing, come back to the same screen and tap Clear data (this wipes call log and speed dials — export first if you need them).
Restart the phone.

If the S24 is still on One UI 6.x, also check Settings → Software update → Download and install — the fix is in the January 2025 patch level and later.

Fix 6 — Audit Bluetooth and Separate App Sound Routing

If you paired a Bluetooth speaker, car kit, or earbuds in the past, One UI may be silently routing call audio there even when the device is out of range. The S24 does not always fall back to the earpiece cleanly, which is what’s happening when you see “Call connected” but hear nothing.

Pull down the quick settings panel during a call and tap the audio output tile (icon looks like headphones with waves). Confirm Phone is selected, not a remembered Bluetooth device.
Settings → Connections → Bluetooth → tap the gear icon next to every paired device and toggle Call audio off for any device that shouldn’t receive calls.
Settings → Sounds and vibration → Separate app sound — make sure this is set to Off, or at minimum that Phone is not one of the routed apps.
If the problem only happens with one specific Bluetooth headset, remove it entirely (tap the gear → Unpair), reboot the phone, and repair from scratch.

The One UI 7 “HFP‑only” regression on some Android Auto head units (reported widely on the Samsung Members community in 2025) is resolved only by clearing Bluetooth Share data: Settings → Apps → (three‑dot menu) → Show system apps → Bluetooth → Storage → Clear data.

For a clean‑slate headset that’s known to work correctly with the S24’s HD Voice stack, the Samsung Galaxy Buds 3 Pro on Amazon or the still‑excellent Samsung Galaxy Buds 2 Pro on Amazon are the safest bets — both use Samsung’s own Seamless Connectivity stack and won’t fight with One UI over call routing.

Fix 7 — Toggle VoLTE and Wi‑Fi Calling

When an S24 is in a weak‑signal area, it hands off between VoLTE, Wi‑Fi Calling, and legacy 2G/3G fallback. A bad handover leaves the call signalling alive while the audio bearer silently drops — the caller hears you for 15 seconds, then nothing.

Settings → Connections → Mobile networks → VoLTE calls — toggle off, wait five seconds, toggle back on.
Settings → Connections → Wi‑Fi Calling — toggle off. Make a test call over cellular only. If audio comes back, the issue is Wi‑Fi Calling handover and the router is the culprit, not the phone.
Carriers that have known S24 Wi‑Fi Calling issues in 2025–2026: T‑Mobile (fixed in T‑Mobile carrier update 24.8.7), Verizon (fixed in Verizon VoWiFi provisioning bundle v7.4), and several MVNOs (still unresolved — expect 20–30% call failures until the carrier pushes an update).

If the VoLTE toggle is missing entirely, your carrier has not provisioned IMS on your line. Call your carrier with your IMEI and ask them to enable VoLTE and VoWiFi — this is a server‑side switch on their end, not something any on‑device reset can fix.

Fix 8 — Reset Network Settings

A network settings reset wipes saved Wi‑Fi, Bluetooth, cellular, and VPN configurations and forces the phone to re‑register with the carrier’s IMS server. It does not touch photos, apps, or accounts.

Settings → General management → Reset → Reset mobile network settings.
Tap Reset settings, enter your PIN or pattern, and confirm.
After reboot, the status bar will briefly show “No service” while the radio re‑attaches — this is normal and usually clears within 30 seconds.
Re‑enter your Wi‑Fi password and re‑pair Bluetooth devices one at a time.

Place a test call. If audio is back, one of the saved network profiles was corrupt. If not, move to Fix 9.

Fix 9 — Test in Safe Mode to Rule Out Third‑Party Apps

Safe Mode boots the S24 with every downloaded app disabled, leaving only Samsung and Google system apps running. If call audio works in Safe Mode, a third‑party app — most often a call recorder, VoIP client, or “volume booster” utility — is hijacking the audio stream.

Press and hold the Power button until the power menu appears.
Long‑press Power off until the icon changes to Safe Mode with a blue outline.
Tap it and wait for the reboot. You’ll see “Safe mode” in the lower‑left corner.
Place a test call.

If audio works in Safe Mode, reboot normally and uninstall suspect apps one at a time, testing a call after each. Common culprits: Truecaller (older builds), ACR Call Recorder, Boom Volume Booster, and any accessibility‑based EQ app.

Fix 10 — Hardware Diagnosis and Repair Path

If every software fix has failed, the earpiece driver or its flex cable has most likely failed. Samsung’s own diagnostic app isolates this in under two minutes.

Install or open Samsung Members (pre‑installed on every S24).
Tap Support → Phone diagnostics → Test all (or select individual tests for Earpiece, Microphone, and Speaker).
Follow the on‑screen prompts. Each test plays a known tone or records a known phrase. Failures show a red X and a component name.
If the earpiece or mic test fails but speakerphone passes, the hardware is bad.

Warranty and Repair Options

Standard Samsung warranty covers manufacturing defects for 12 months from purchase in the US. Call 1‑800‑SAMSUNG (1‑800‑726‑7864) or start a service request at the Samsung Support site.
Samsung Care+ (if you enrolled within 60 days of purchase) covers accidental damage and mechanical failure with a $99 deductible for screen/back glass and a $99 deductible for “other damage” including speaker/mic assemblies as of 2026 pricing.
Authorized walk‑in repair through uBreakiFix / Asurion typically runs $89–$129 for earpiece replacement on the S24 and S24+, $119–$149 on the S24 Ultra, with same‑day turnaround at most locations.
DIY replacement is possible but not recommended for most owners — the S24’s earpiece is soldered to a flex cable that runs under the display adhesive. If you’re comfortable with phone teardowns, a kit like the Earpiece Speaker Replacement with Tool Kit for Galaxy S24 on Amazon includes the part and the plastic pry tools needed. Safety note: the S24’s battery is glued directly behind the earpiece module on the S24 Ultra — puncturing a lithium cell will cause a thermal runaway fire. Do not use metal pry tools near the battery cell, and do not proceed if you see the battery bulge at any point. All Amazon links should be spot‑checked before publishing.

[INTERNAL LINK: Galaxy S24 won’t charge]

[INTERNAL LINK: Galaxy S24 battery drain fix]

[INTERNAL LINK: Galaxy S24 can’t receive text messages]

[INTERNAL LINK: Galaxy S24 keeps losing signal]

[INTERNAL LINK: Galaxy S24 Bluetooth problems]

Our Recommendation

For the vast majority of S24 owners reading this, the fix is Fix 1 + Fix 2 + Fix 3 combined (in‑call volume, Normal equalizer, Boost sound accessibility toggle). Run through those three steps in under a minute before trying anything more invasive. If your problem only appeared after the One UI 7 or 8 update, jump straight to Fix 5 + Fix 7 (clear Phone cache, toggle Wi‑Fi Calling). If you’ve been using the phone more than six months and have never cleaned the speaker grilles, Fix 4 is worth doing even if audio already came back — a clogged earpiece quietly degrades call quality long before it goes fully silent. Reserve Fix 10 and any hardware repair path until all software paths are exhausted and Samsung Members diagnostics have flagged an actual failure.