Have you noticed that your Xiaomi smartphone only has audio from the top speaker when talking or playing music? This is a common problem that can occur on both new and old models, from the budget Redmi Note to the flagship Xiaomi 13/14. In most cases, the malfunction is not critical, but it should not be ignored: it can be a sign of both a software failure and a serious hardware breakdown.
In this article, we'll look at all the possible reasons why sound only comes from the top speaker, from the banal contamination of the grille to damage to the audio chip, how to diagnose the problem yourself, what settings to check first, and when to exactly contact the service center, and we've also collected the current solutions for different scenarios, from resetting to changing the speaker.
Important: if the problem appeared after a phone fall, moisture or self-disassembly, immediately go to the section about hardware malfunctions - there you will find a checklist to check for physical damage.
How the sound system works in Xiaomi smartphones
Before you look for the cause of the malfunction, you need to understand how the audio system in Xiaomi phones works. Most models use stereo sound with two speakers:
- 🔊 Top speaker - usually located next to the front camera, responsible for the speaker (for calls) and part of the stereo sound when playing music / video.
- 🔊 The bottom speaker is on the bottom end of the device, used for stereo effect and sometimes duplicates the top one when talking in hands-free mode.
In some models (for example, Redmi 9A or POCO M3) the bottom speaker may not be available – then the sound always comes from the top.
If your smartphone is supposed to have two speakers, but the sound is only coming from the top, that's a clear sign of a malfunction.
Programmatic reasons: when the fault of the software
In 60 percent of cases, the sound from a single speaker is caused by software failures, which can be fixed by yourself without disassembling the phone.
- 📱 Failure of the audio driver - after the update MIUI or installing third-party applications (e.g. Equalizer) the driver could "fly off".
- 🔇 Incorrect sound settings – accidentally turning off stereo sound or activating Monosound mode (for example, for hearing aids).
- 🎵 Application conflict – some players (e.g. Poweramp or Poweramp) VLC) They can force the sound to be redirected to one channel.
- 🔄 Error after update MIUI — Especially relevant for betta versions of firmware.
How do you check? First, reboot your phone, which helps 30 percent of the time, and if it doesn't, go to the diagnostics.
☑️ The first steps in dealing with sound
Diagnostics of the problem: how to understand what is the matter
To determine the cause, follow these steps:
- Check both speakers manually: Run a YouTube video and listen to -- is it coming from the top? Call the phone from another device and turn on speaker -- is the bottom speaker working?
Use the test mode.
Type #4636### in the phone app, select Audio Testing and check both speakers separately.
Check the MIUI settings
Go to Settings → Sound and Vibration → Sound settings and make sure stereo is turned on (if the option is available).
If the bottom speaker doesn't make any sound in any of the tests, it's more hardware, and if there's sound, but it's quiet or it's distorted, it's software or pollution.
What if the #4636## code doesn’t work?
Hardware malfunctions: when without repairs can not do
If the software methods didn't work, the problem is the hardware.
| Reason. | Signs. | Can I correct myself? |
|---|---|---|
| Dynamic pollution | There's a sound, but it's muffled, with wheezing. | Yeah (brush and alcohol) |
| Damage to the plume speaker | The sound disappears when you press the body | No (replacement or ration needed) |
| The failure of the audio chip | There is no sound in the speakers or headphones. | No (chip replacement required) |
| Moisture intrusion | The sound is distorted, the phone is overheating. | Partially (drying, but often needing replacement) |
Critical information: If the sound is lost after a phone drop or contact with water, DO NOT try to disassemble it yourself, 90% of the time it causes damage to the board and increases the cost of repairs.
⚠️ Warning: If you notice that the sound from the top speaker is accompanied by overheating of the phone or self-reboots, immediately turn off the device.
Step-by-step: how to return stereo sound
If the diagnosis showed that the problem is software, follow this algorithm:
- Reset the audio settings: Go to Settings → Applications → Application Management → Three dots (menu) → Reset the application settings. This will bring the audio settings back to the factory settings.
- Update MIUI: Go to Settings → About Phone → System Update and install the latest firmware version.
- Remove conflicting apps: Remove Equalizer, Dolby Atmos (if installed unofficially), and any audio-change apps.
- Perform factory reset: If nothing worked, make a full reset via Settings → Additional → Restore and Reset. Remember to save the data!
Instructions:
- Turn off the phone and remove it. SIM-map.
- Apply 1-2 drops of alcohol on the brush and gently walk along the speaker grille.
- Let the phone dry for 10-15 minutes (you can accelerate the dryer in cold mode).
- Check the sound after you turn it on.
⚠️ Warning: Do not use cotton swabs or toothpicks - they can damage the speaker membrane. Also do not blow into the speaker with your mouth: moisture from breathing can aggravate the problem.
When to contact the service center
If you've tried all the techniques, but the sound is still coming from the top speaker, it's time to call the experts.
- 🔧 Sound disappeared after mechanical damage (fall, impact).
- 💧 The phone was in contact with the liquid (even if everything was dry on the outside).
- 🔥 The speaker warms or smells of burns.
- 🎧 There is no sound in headphones or via Bluetooth.
The average cost of repairs in official Xiaomi services:
| Type of repair | Cost (₽) |
|---|---|
| Replacement of the lower speaker | 1 200 — 2 500 |
| Cleaning/cleaning of the plume | 1 500 — 3 000 |
| Replacement of audio chip | 3 500 — 7 000 |
Contact authorized service centers only – this guarantees the use of original spare parts and the preservation of the warranty (if it is still valid).
💡
If the phone is warranty, DO NOT open it yourself. Any trace of disassembly will void warranty obligations.