Why does not work one headphone in wireless Xiaomi Mi True: diagnosis and repair

Xiaomi Mi True wireless headphones (including Mi True Wireless Earphones 2, Mi Air 2, Mi AirDots, and others) have become popular due to a combination of price, sound quality and convenience. However, many users face a typical problem: one earphone stops working — does not connect to the phone, does not make a sound or permanently disconnects. 80% of the time this is solved without going to the service center, but it is important to correctly diagnose the cause.

In this article, we'll look at all possible malfunction scenarios, from simple battery failure to hardware breakdowns, learn how to reset headphones, check Bluetooth connections, clean contacts, and even restore firmware. FAQ-quick-response.

Before you start the repair, answer one question:

1. Checking the underlying causes: battery, charging and physical damage

Start with the obvious, check the headphones. Even if the indicator on the case is green, it does not guarantee that both earphones are charged the same. In the Mi True Wireless Earphones 2, for example, there is a common problem when one earphone discharges faster due to a faulty battery.

How to check:

• 🔋 Put both headphones in the case for 10-15 minutes, then pull out and try to connect.
• 🔍 Look at the charge indicators: if one earphone flashes red and the other flashes white, the battery is the problem.
• 🔌 Try charging the case from another cable or power supply (sometimes faulty is to blame). USB-port).

If the earphone doesn't respond to charging at all, check the contacts inside the case and on the earpiece itself. In 30 percent of cases, the problem is solved by cleaning the contacts with alcohol or eraser - oxidation or dirt disrupts the connection. Use a cotton swab dipped in isopropyl alcohol, and gently wipe the metal pads.

⚠️ Note: Do not use abrasive materials (paper sandpaper, metal brushes) – this will damage the coating of contacts and exacerbate the problem.

Try charging the case from another cable |

Clear the contacts of headphones and case |

Check the charge indicators on both headphones |

Reboot your smartphone and headphones

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2. Resetting headphones and re-pairing with the phone

If one earphone is plugged in but doesn’t make a sound, or the phone doesn’t see it, it’s likely that Bluetooth has crashed, a typical problem for Xiaomi Mi AirDots and Mi True Wireless Earphones Basic, where the headphones can “forget” each other.

How to reset your settings:

1. Put both headphones in the case and close the lid.
2. Press and hold the button on the case (or the touchpad on the headphones, if any) for 10-15 seconds until the indicator starts flashing red and white.
3. Remove the headphones from the case – they should automatically go into pairing mode (blinking white light).
4. On your phone, remove your headphones from the list of Bluetooth devices (Settings → Bluetooth → Xiaomi Mi True → Forget the device).
5. Connect again by selecting Xiaomi Mi True from the list of available devices.

If the reset didn’t work, try connecting the headphones to another phone or PC. If they work normally on the second device, the problem is with your smartphone settings (more on this in the next section).

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On some models (such as the Mi Air 2 Pro), the reset is done by triple tapping the touchpad on the headphone for 3 seconds.

3. Bluetooth problems on the phone: settings and conflicts

Sometimes it's not the earbud itself that's to blame, but the Bluetooth module of the smartphone, and this is especially true on devices with custom firmware or after Android/iOS updates.

• 📱 Reboot your phone – it will reset temporary Bluetooth errors.
• 🔄 Update the firmware of the headphones (if available).For Xiaomi Mi True Wireless Earphones 2 updates come through the Mi Home app.
• 🚫 Disable other Bluetooth devices (fitness bracelets, smart watches, speakers) that may interfere with the device.
• 🔧 Reset network settings on your phone (Settings) → System system → Reset → Reset Wi-Fi, mobile network and Bluetooth).

If you are using a Xiaomi or Redmi smartphone, check the MIUI Optimization settings:

1. Go to Settings. → The phone.
2. Click 5 times on the MIUI version to activate the developer mode.
3. Back to Settings → Additionally. → For developers.
4. Find the option to Disable MIUI Optimization and turn it on.
5. Reboot the phone.

This option sometimes conflicts with Bluetooth headphones, especially after system updates.

4. Hardware malfunctions: what can be repaired independently

If the software methods didn't work, the problem might be a physical breakdown.

For self-repair will need:

• 🔧 Set of screwdrivers (including T2 and T4 case-breaker).
• 🔥 A soldering iron with a thin sting (for repairing wires).
• 🧴 Thermoclee or epoxy resin (for bonding the body after disassembly).
• 🔍 Loupe or microscope (contacts are very small!).

Warning: Disassembling the Xiaomi Mi True headphones requires care - the body is glued together, and there are many fragile parts inside. If you have never soldered microelectronics, you should contact the service.

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The most common hardware problem is the wire break between the battery and the board, and you can only see it after you disassemble the headphone.

5. Update the firmware of headphones through Mi Home

The manufacturer regularly releases updates for Xiaomi Mi True, which fix connection and sound errors. If your headphones have not been updated in a long time, this can be the cause of the malfunction.

How to update firmware:

1. Install the Mi Home app (available for Android and iOS).
2. Connect the headphones to the phone via Bluetooth.
3. Open Mi Home, click Profile → Settings → Update the firmware.
4. If the update is available, follow the instructions on the screen. Don't turn off the headphones during the process!

For Mi True Wireless Earphones 2 and later, the update can take up to 10 minutes.

⚠️ Note: If the upgrade fails (e.g., the battery dies), the headphones may stop turning on, and only flashing through the Fastboot in the service center will help.

6. Alternative ways of connecting: monoconnection and third-party applications

If one earbud works and the other doesn't, you can try to connect them separately in mono-connection mode, which is a temporary solution, but it will help you understand which earbud is the problem.

How to connect one headphone:

1. Take out of the case only a working headphone.
2. Press the touchpad (or button) for 5 seconds until the indicator starts flashing white.
3. Connect it to your phone as a new device (Xiaomi Mi) True_L Xiaomi Mi. True_R).

If the mono-connection works, the problem is synchronization between the headphones. Try using third-party apps to diagnose:

• Bluetooth Auto Connect automatically restores the connection.
• TWS Checker – shows the level of charge of each headphone.
• Developer Options (in Android settings) – allows you to enable Bluetooth Audio Codec (select SBC or AAC instead of aptX if the sound is interrupted).

7. When to contact the service: prices and warranty

If none of the methods helped, the problem is likely hardware: Here are the approximate prices for repairs in service centers (for Moscow and the regions):

Before contacting the service:

• 📄 Check the warranty card – if the headphones are warranty (usually 12 months), the repair will be free.
• 🔍 Take a picture of the malfunction (for example, a non-burning indicator or a damaged case) – this will speed up the diagnosis.
• 📞 Check with the wizard if they work with Xiaomi – some services specialize only in Apple or Samsung.

Official Xiaomi service centers in Russia can be found on the website: mi.com/ru/service.

FAQ: Quick answers to frequent questions