Why Xiaomi only has one headphone: a complete analysis of the problem

You've turned on your favorite playlist, but instead of stereo, you hear only the left or right channel? The problem with Xiaomi running only one headphone is found in one in five owners of smartphones of this brand - from budget Redmi Note to flagship Xiaomi 13 Ultra. The reasons can lie in both banal contamination of the connector and serious hardware malfunctions. In 60% of cases, the problem can be fixed on its own in 5-15 minutes, but sometimes requires the intervention of the service center.

In this article, we will look at all possible causes, from software failures to physical damage, and give step-by-step instructions for diagnosis and repair. We will focus on models with a 3.5 mm connector (Redmi 9A, Poco X3) and smartphones without it (Xiaomi 12 Pro, Mix 4), because the verification algorithms for them are different, and you will learn how to distinguish between headphone failure and phone malfunction and when to contact the service.

1. Check headphones: how to exclude their malfunction

Before you go through Xiaomi's settings, make sure that the problem isn't with the headphones themselves. Statistically, 40 percent of the time, the accessory is to blame -- especially if it's cheap, uncertified models.

• 🔌 Connect your headphones to another device (laptop, tablet, second phone) If the problem persists, the headphones are faulty.
• 🎧 Try the other headphones on your Xiaomi. If both channels work, the first accessory is to blame.
• 🔍 Examine the plug and wire: Grated veins, a bent connector, or oxidized contacts often cause a single channel to break.
• 🔊 Check the sound balance in the phone settings (more on this in the next section).

If your headphones are wireless (Xiaomi AirDots, Redmi Buds, etc.), follow the following steps:

1. Reset the headphones to factory settings (usually by pressing the button for 10-15 seconds).
2. Remove them from the list of associated devices in Settings → Bluetooth and connect again.
3. Check if the "Mono" (one-way sound) mode is activated in the headset settings.

⚠️ Warning: If True Wireless (TWS) headphones only connect in mono mode, the problem may be a firmware failure in one of the ears, in which case only firmware reflashing through proprietary software (e.g., Xiaomi Earphones App) will help.

2. Sound settings on Xiaomi: balance, modes and resets

Often the problem lies in the software settings of the smartphone. Xiaomi based on MIUI has several pitfalls that can lead to a shutdown of one of the channels.

Sound balance (left/right channel)

The wrong balance settings are the most common reason why one earbud is quieter or not working at all.

1. Open Settings → Sound and vibration → Sound settings.
2. Find the "Balance of Sound" item (in some versions of MIUI it is hidden in the Additional settings).
3. Make sure the slider is in the middle, and if it's moved left or right, move it to the center.

If there is no "Balance of Sound" option, try an alternative path:

Settings → Special. capabilities → Hearing → Monoaudio (disable)

Sound modes and effects

MIUI offers several pre-installed audio profiles that can conflict with headphones.

• 🎛️ Equator: Go to Settings → Sound → Equalizer and select Default.
• 🔇 Do Not Disturb Mode: Check if it is activated in the notification curtain.
• 🎵 Sound effects: Some firmware has the Mi Sound Enhancer option — turn it off.

If the sound has not recovered after the changes, reset the sound settings:

Settings → System → Resetting settings → Resetting sound settings →

Sound balance checked.

Sound effects are off.

Resetting the sound settings

Updated MIUI firmware

Rebooted phone-->

3. Cleaning of the connector 3.5 mm: step-by-step instructions

If you use wired headphones, a contaminated jack is the second most common cause of the problem, and dust, pile, contact oxidation, or even moisture can interrupt the connection of one of the channels, and cleaning the connector takes 5 minutes and solves the problem in 30% of cases.

What you need:

• 🕯️ Toothpicking (wooden to avoid damaging contacts).
• 🧴 Alcohol (90%+) contact-cleaner.
• 🧻 Cotton swabs (better with a plastic base).
• 💡 Lantern (for lighting the connector).

Step-by-step cleaning:

1. Turn off the phone and get it out. SIM-card/memory card (if the connector is combined).
2. Light the jack with a flashlight, and if you see black dots, green oxidation, or pile, that's evidence of pollution.
3. Wet your toothpick in alcohol and gently walk through the internal contacts (don't push hard!) and pay attention to the four metal strips that are responsible for the left/right channel, microphone and ground.
4. With a cotton swab dipped in alcohol, wipe the outer part of the connector.
5. Let the phone dry for 10-15 minutes (don’t turn it on earlier!).

⚠️ Warning: Never use metal objects (needles, paper clips) to clean the connector, they can close the contacts or scratch the coating. If after cleaning the sound is not restored and you see bent contacts in the connector, you will need to replace the socket in the service.

4. Check Bluetooth headphones: the specifics of Xiaomi

With wireless headphones, the diagnostic algorithm is different. Xiaomi (especially models with MIUI 12-14) are known for bugs in the Bluetooth stack, which can lead to the "loss" of one of the channels.

4.1. Bluetooth codecs

Codec incompatibility is a common reason why the right or left earphone shuts down 1-2 seconds after you connect. MIUI can choose the default aptX or LDAC codec that doesn't support budget headphones.

How to change codecs:

1. Activate Developer Mode (7 times click on the MIUI version in Settings → About Phone).
2. Back to Settings → Additionally. → For developers.
3. Find the “Bluetooth Audio Codec” option and select SBC (the most versatile).
4. Turn off the Bluetooth Audio Dual Channel (if any).

Resetting of the Bluetooth module

If the headphones are connected, but the sound is only in one, perform a full reset of Bluetooth:

Settings → Connections → Bluetooth → ⚙️ (settings → Reset Bluetooth settings

After discharge:

• 🔄 Reboot the phone.
• 🔗 Reconnect the headphones (they must be defined as a new device).
• 📱 Update the headphone firmware through the official app (e.g. Xiaomi Earphones for AirDots).

💡

If Xiaomi headphones only connect in mono mode, try disabling Dynamic Sound Switch in Bluetooth settings. It may conflict with some TWS models.

5. Hardware breakdowns: when without service can not do

If all the software methods have been tried and one headphone on Xiaomi still doesn't work, the problem is probably hardware.

How to diagnose a hardware breakdown:

1. Check the phone speaker: if the sound in it also comes from only one side (for example, when playing music without headphones), the problem is the audio chip.
2. Connect the headphones to your PC via the OTG- cable (if the Type-C connector is working), if both channels are working, it's the phone's fault.
3. Look at the charging indication (for Type-C): if the phone doesn't define the headphones as an audio device (there's no headphone icon in the status bar), the problem is the connector or controller.

⚠️ Warning: If your phone falls or gets wet, don't try to disassemble it yourself - modern Xiaomi has adhesive joints and brittle plumes. Improper repair can lead to a complete loss of warranty and a cost of recovery of 2-3 times.

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If the phone is warranty, do not clean the connector with alcohol and do not disassemble the case - this will void the warranty obligations.

6. Features of models without 3.5 mm connector (Type-C/Bluetooth)

Xiaomi smartphones without traditional audio jack (Xiaomi 11T, 12 Pro, Mix 4, etc.) use Type-C or Bluetooth to output sound.

Problems with Type-C

If you connect headphones through an adapter or directly to Type-C, check:

• 🔌 Adapter quality: Cheap adapters often don't support stereo sound. Use the original one from Xiaomi.
• 🔄 OTG Mode: Some phones require File Transfer (OTG) to be enabled in the notification curtain.
• 📱 Settings USB: Go to Settings → Additional → USB and select Charge or Audio.

If the sound is interrupted or only in one headphone, try:

Settings → Sound → Additional → Disable “Automatic Accessories Detection”

6.2. Bluetooth in new versions of MIUI

MIUI 13-14 has a feature called Dynamic Sound Switching, which can interfere with headphones.

Settings → Connection → Bluetooth → ⚙️ (settings) → Dynamic switching of sound (off)

There's also a bug in the new firmware that caches Bluetooth devices to reset the cache:

1. Open Settings → Applications → Application Management.
2. Find "Bluetooth" in the list of system applications.
3. Press Warehouse. → Clear the cache.
4. Reboot the phone.

7. Firmware Update: Why It Matters

In 15% of cases, the problem with a single headphone is solved by updating MIUI. The manufacturer regularly releases patches to fix bugs with sound, especially after major updates. For example, MIUI 12.5 had a massive bug with Bluetooth A2DP, which caused the headphones to work only in mono mode.

How to update firmware:

1. Go to Settings → About the phone → System update.
2. Click "Check Updates."
3. If a new version is available, download it and install it.

If the update doesn’t work, try retracing to the previous version of MIUI (if the problem has occurred after the update).

• Download the old firmware from the official Xiaomi website.
• Go to Settings → About Phone → MIUI version and tap the MIUI logo 10 times to activate the hidden menu.
• Select the Choose update package and specify the path to the downloaded file.

⚠️ Warning: Running back the firmware will erase all data on the phone! pre-backup to Settings → Additional → Backup and Reset.

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If you have lost sound in one headphone after the update, check the Known Problems section of the firmware description on the 4PDA or XDA Developers forum, which often publish temporary solutions.

8.When to contact the service: checklist before the visit

If you’ve tried all the methods in this article, but one headphone on Xiaomi never worked, it’s time to contact the service center.

Check the headphones on another device

Make a backup copy of the data

Record the IMEI of your phone (on the box or in *#06#)

Determine whether the guarantee is maintained

Prepare a check (if the phone is guaranteed)-->

How to choose a service:

• 🛠️ Official Xiaomi service: warranty repair, original spare parts, but more expensive and longer (7-14 days).

Average repair prices (2026):

If the phone is warranty, do not agree to unofficial repairs - this will void the warranty on the entire device.

FAQ: Frequent questions