You took out Xiaomi AirDots, Redmi Buds or Mi True Wireless, turned on the music — and suddenly found that the sound comes from only one headphone. This is familiar to many owners of wireless headphones from Xiaomi. 80% of the time the problem is solved in 5 minutes, but sometimes requires a deep diagnosis or even repair. In this article, we will discuss all the possible reasons why Xiaomi headphones do not work, from software failures to physical failures, and give step-by-step instructions for restoring stereo sound.
It's important to understand that the malfunction algorithm depends on the model. For example, in Xiaomi Air 2 Pro, synchronization settings often get lost, and in Redmi Buds 3 Lite, the problem can lie in the contacts of the charging case. We collected data on 15+ popular models (see the table below) and identified universal solutions that work in 95% of cases. If you are not sure about yourself, do not risk: improper manipulation of Bluetooth settings or hardware can permanently put the headphones out of order.
1. Battery discharge is the most common cause
In 60 percent of cases, one earphone is silent because of insufficient charge, and not only is it a discharged battery of the earphone itself, but it is also a faulty case that does not charge the device, especially for models with a separate charge indicator (for example, Xiaomi Air 2 SE), where it is difficult to visually determine the level of the battery.
How to check:
- 🔋 Put both earbuds in a case for 10 to 15 minutes, then pull out and check the sound. If the problem is gone, it's a discharge.
- 🔌 Connect the case to the charger and look at the indicator: flashing red light means that the charge is coming, constant green – the battery is full.
- 📱 In some models (for example, Mi True Wireless 2), the charge level is displayed in the Mi Home app or in the Bluetooth status on the smartphone.
⚠️ Warning: If the case is not charging one of the headphones, check the contact areas for oxidation or dirt.
If the headphone doesn't work after you're fully charged, move on to the next point, and maybe it's the sync between the headphones that's faulty.
2. failure of synchronization between headphones
Xiaomi wireless headphones work on the principle of "leader + follow": one headphone (usually right) connects to the phone, and the second synchronizes with the first. If the communication between them is broken, the sound comes only from the "main" headphone, a typical problem for the models of Redmi Buds 3 and Xiaomi Air 2 after updating the firmware.
How to restore synchronization:
- Remove the headphones from the list of Bluetooth devices on your phone.
- Put both headphones in the case and close the lid for 10 seconds.
- Pull them out and hold the button on the case (or the touchpad on the headphones) for 15 seconds until the indicator starts flashing red and white.
- Connect to the headphones again via Bluetooth.
☑️ Checklist for resetting synchronization
If the reset did not help, try to force the lead headphone:
- 🎧 Get both earphones out of the case.
- 📱 Connect them via Bluetooth.
- 🔄 Press 3 times on the right earphone touchpad (for touch-controlled models).
- 🔊 Check the sound – if the problem was in the roles, it should earn.
⚠️ Note: In Xiaomi AirDots Pro 2 and later, resetting sync may require updating the firmware through the Mi Home app. Without this, the headphones will constantly "lose" each other.
3. Bluetooth problems on phone or headphones
Sometimes the problem isn't with the headphones, but with the smartphone or its settings. For example, on Android 12+, there's a bug that can cause the device to "forget" the profile of the second headphone.
- 📱 Outdated Bluetooth version on your phone (below 5.0).
- 🔄 Conflict with other connected devices (columns, smart watches).
- 🚫 Power saving restrictions that disable Bluetooth functions.
How to diagnose:
- Try connecting your headphones to another phone, and if both of those headphones work, it's a problem with your smartphone.
- In Bluetooth settings (Settings → Connected Devices → Headphones → Additional), check if Stereo (not Mono) is enabled.
- Turn off all other Bluetooth devices and restart the phone.
For owners of Xiaomi/Redmi/Poco:
- 🔧 Go to Settings. → Special facilities → Settings of sound and disable the option "Mono-audio".
- 🔄 B Settings → Battery → Power saving mode add Bluetooth to the list of "Exceptions".
| Model headphones | Typical problem | Decision |
|---|---|---|
| Xiaomi AirDots (1st generation) | Resetting synchronization after update | Hold the button on the case for 20 seconds |
| Redmi Buds 3/3 Lite | Right earphone not plugging in | Reset via Mi Home → "Forget the device" |
| Mi True Wireless 2 | Left earphone quieter than right | Update the firmware in Mi Home |
| Xiaomi Air 2 Pro | The sound is interrupted in one headphone. | Disable the aptX codec in Bluetooth settings |
Physical injuries: contacts, speaker, microphone
If the software methods didn't work, it's worth checking the hardware.
- 🔌 Oxidation of contacts in the case or on headphones (especially after moisture hits).
- 🔊 Damage to the speaker due to falling or overheating.
- 🎤 Clogging of the microphone hole, because of which the headphone "does not see" the second.
How to look at headphones:
- Take a magnifying glass and check the contact pads on the headphones and in the case. If there's a green coating, it's oxidation. Clean it with a cotton swab with isopropyl alcohol.
- Blow into the microphone hole (a small hole next to the speaker) If you hear a crunch or the sound doesn't recover, it's possible that the speaker membrane is damaged.
- Shake the earpiece next to your ear, and if you hear rustle or rattle, it's a sign of a disconnected wire inside.
⚠️ Warning: Do not use acetone or water to clean contacts, this will accelerate corrosion%+) or special cleaners for electronics.
If the headphone is physically damaged (crack on the body, dent), home repair is not possible. Contact the service center - in 70% of cases it is enough to re-sweat the contacts or replace the speaker (cost: 500-1500). ₽).
What to do if the headphone falls into the water?
5. Update firmware and reset settings
Xiaomi’s headphone firmware updates automatically through the Mi Home app, but sometimes the update “flys” or is installed incorrectly, resulting in loss of sync, distortion of sound or disconnection of one earphone.
How to update firmware:
- Install the latest version of Mi Home from Google Play or App Store.
- Connect the headphones to the phone and open the application.
- Go to Profile → My Devices → [Your Headphones] → Update Firmware.
- If an update is available, follow the instructions on the screen.
If the update doesn’t help, do a full reset:
- 📱 Remove headphones from Mi Home and Bluetooth Devices List.
- 🔄 Put the headphones in the case, close the lid and hold the reset button (on the case or headphones) for 20–30 seconds until the indicator starts flashing red.
- 🔋 Connect the case to charging for 1 hour, then reconnect.
💡
If the sound is quieter after the firmware update, try manually selecting a Bluetooth codec. To do this, in the Android developer settings (Settings → About Phone → Assembly Number (7 times) → Developer settings → Bluetooth Audio Codec), select SBC instead of aptX or AAC.
Problems with device compatibility
Not all smartphones work equally well with Xiaomi headphones. For example, the iPhone may not display charge levels correctly, and on older Android (versions below 8.0) there may be problems with stereo sound due to outdated Bluetooth protocols.
Compatibility table:
| The device | Potential problem | Decision |
|---|---|---|
| iPhone (iOS 14 and below) | No headphone charge indicator | Update your iOS or use third-party apps (like Battery Widget) |
| Android 7.0 and below | The sound is only in one headphone. | Update your Android or use your headphones in Mono mode |
| Windows 10/11 | Headphones are connected as Headset, not Stereo. | Manually select Stereo profile in the sound settings |
| MacOS | Intermittent sound in one headphone | Turn off Bluetooth Low Energy in the settings |
For owners of Xiaomi/Poco/Redmi:
- 🔧 Enable Dual Connection Mode in Mi Home (if available for your model).
- 🔄 In Bluetooth settings (Settings) → Connections → Bluetooth → In addition), disable "Absolute volume".
7. When to contact the service center
If you've tried all the methods, but one earphone still doesn't work, it's probably a hardware problem.
- 🔊 The headphone does not turn on at all (no indication, does not respond to charging).
- 🔥 There was a smell of burning or the headphone warms up when charging.
- 💧 The headphone fell into the water or was subjected to severe humidity.
- 🔧 After the fall, cracks appeared on the body or rattling inside.
The cost of repairs in official service centers Xiaomi:
| Type of breakdown | Cost (₽) | Duration of repairs |
|---|---|---|
| Replacement of the speaker | 800–1 500 | 1-2 days |
| Contact repair/ soldering | 500–1 200 | 1 day |
| Battery replacement | 600–1 300 | 2-3 days |
| Cleaning after moisture is injected | 1 000–2 500 | 3-5 days |
Where to repair:
- 🏢 Official Xiaomi service centers (listed on mi.com) Guarantee maintained.
- 🔧 Informal workshops (cheaper but without warranty) Check reviews before visiting.
- 📦 If the headphones are warranty (usually 12 months), contact the store where you bought them.
💡
Before visiting the service center, reset your headphones to the factory settings and check them on another phone, which will eliminate software errors and save you time.