Why does not work one headphone in Xiaomi Mi True Wireless: a full analysis of the causes and solutions

You took out the Xiaomi Mi True Wireless case, turned on your favorite playlist, and suddenly you found one of the headphones was silent like a fish. TWS-Headphones Xiaomi, and the reasons can lie in the banal settings of the smartphone, and in serious hardware failures. In this article, we will not just list possible malfunctions, but will analyze them by the degree of criticality - from those that you fix in 30 seconds to those that require a visit to the service center.

Mi True Wireless (including Basic 2 models, SE, 2S And others -- their symmetrical architecture, where each earbud can be both master and slave, which means that a problem with one earbud often affects the performance of the other, for example, if the right earbud doesn't work, the left earbud can start to "glut" with the connection or sound. We analyzed user reviews on forums 4PDA, Mi Community and service centers to highlight the most common causes of malfunction, which the manufacturer is silent in the official documentation.

1. Checking the basic settings: why the earphone can be turned off software

Before you disassemble your headphones or carry them for repair, make sure that the problem is not with your smartphone settings or the Mi True Wireless itself. 40% of the time, the silence of one earphone is due to:

• 📱 Mono mode (when the sound is transmitted to only one headphone at the user's choice).
• 🔊 Balance of volume shifted to one side.
• 🔄 Automatic switching of audio devices (for example, to the phone speaker).
• 🚫 Blocking the headphone in Bluetooth settings.

On Android, check:

1. Open the Settings. → Connected devices → The gear settings next to Mi True Wireless.
2. Make sure that the Mono audio option is turned off.
3. Check the Balance slider in the sound settings - it should stand in the middle.

On the iPhone:

1. Go to Settings → Universal Access → Audiovisual content.
2. Turn off the Monoaudio option.
3. In Control Point (swipe down) click on the AirPlay icon and select Mi True Wireless manually.

⚠️ If you are using Xiaomi Mi True Wireless 2S Or, more recently, the Mi Home app can activate Game Mode, which temporarily disables one earbud to reduce the audio delay.

2.Resetting headphone settings: when rebooting doesn't help

If the basic settings are fine but one earbud still doesn't work, the next step is hard reset, which will return the headphones to factory settings and often solve synchronization problems between them, SE, 2S 3:

Put both headphones in the case and close the lid.|Hold the button on the case for 15-20 seconds (until the white indicator flashes)|Remove the headphones from the case and wait for the automatic connection|Remove the device from the Bluetooth list on your phone and reconnect

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If after resetting one headphone has not worked:

• 🔋 Check if it is charged (the indicator on the headphone should burn red when connected to the case).
• 🔄 Try to change headphones in the case – sometimes it helps to change roles master/slave.
• 📱 Connect the headphones to another device (tablet, laptop) to rule out a smartphone problem.

The Mi True Wireless models 2S And then you might need to update the firmware after the reset:

1. Install the Mi Home app (version no lower than 6.0).
2. Put the headphones on the phone.
3. In the Profile section → Mi True Wireless → Update firmware check the relevance of the software.

⚠️ Warning: Don't interrupt the firmware update process! If the indicator on the case flashes blue and the headphones don't respond for more than 10 minutes, it's a sign of a failure.

3. Charging problems: why one earphone is discharged or not charged

One of the most common reasons for the earphone's silence is that it's not just a battery that's dead, but it's also a problem with contacts or a power controller. Here's how to diagnose a malfunction:

If the headphone is charging but not turning on, try the following:

1. Place it in the case for 5 minutes, then remove and hold the touchpad for 10 seconds (until the indicator blinks).
2. If the indicator does not respond, connect the case to the charge and try again.
3. For Mi True Wireless 2 and newer models: try turning on the headphone by putting it in the case and closing the lid for 3 seconds, then opening.

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If the headphone began to discharge quickly after falling or getting moisture, do not try to charge it - this can lead to bloating of the battery.

4. Hardware malfunctions: what breaks inside the headphones

If the software methods didn't help, the problem is probably hardware. In headphones Xiaomi Mi True Wireless most often fail the following components:

• 🔋 Battery – Loses capacity after 300-500 charging cycles (especially in Basic 2 and the Basic 2). SE).
• 🎛️ Dynamics: Breaking of membrane or contacts after falling.
• 📡 Bluetooth module – burns when voltage jumps or overheating.
• 🔌 Charging contacts – oxidized or moved away from the board.
• 🛠️ Microphone – clogged with dust or fails after moisture hits.

How to diagnose a hardware malfunction:

1. Speaker's vertebrae: Connect the earphone to the phone and call it. If you hear interference in the tube or the sound is interrupted, the problem is with the speaker or the plume.
2. Microphone test: Record a voice message. If you hear distortion or silence in the recording, the microphone is faulty.
3. Bluetooth Check: If the headphone connects, but the sound goes to only one channel - a failure in the wireless communication module.

The most vulnerable models:

• Mi True Wireless Basic 2 - weak batteries (average life of 1.5-2 years).
• Mi True Wireless SE — Problems with headphone synchronization after updates.
• Mi True Wireless 2S — overheating of the Bluetooth module with prolonged use.

5. Case problems: why the earphone doesn't charge or turn on

The Mi True Wireless case is not just a case, it's a charger-synchronizing device. If it fails, the headphones can behave unpredictablely: one will work and the other will not, or both will discharge in a few minutes.

• 🔌 Faulty. USB-port (bent contacts, oxidation).
• 🔋 Bloated case battery (swelling can be seen by the divergent seams).
• 📶 Failure of the charging controller (case does not recognize the headphones).
• 🔄 Problems with magnets (earphones are not fixed, contacts are not closed).

How to check the case:

1. Connect it to charge. If the light doesn't go on, the problem is in the port or the battery.
2. Put your headphones in your case and move them, and if the charger flashes, the contacts are contaminated or bent.
3. Try charging the case from another cable/power supply (use the original Xiaomi adapter on the phone). 5V/1And).

If the case does not charge the headphones:

• 🧹 Clean contacts in case and on headphones with an alcohol tampon.
• 🔧 Carefully bend the contact springs in the case (use a non-metallic tool!).
• 🔋 If the case is swollen, don't use it! It's dangerous for headphone batteries.

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If the case stopped charging the headphones after falling or getting moisture, its repair will cost less than buying a new one (the average price of replacing the case battery is 800-1500). ₽).

6.The Impact of Firmware and Updates: When Software Breaks Iron

Mi True Wireless is responsible for synchronizing, processing and saving energy. Software errors can cause one earbud to stop working or become unstable.

• 🔄 The headphones are constantly reconnected or one of them “flies out».
• 🔊 The sound is interrupted or delayed.
• 📵 One headphone is not detected by the phone, although the indicator is on.
• 🔋 Quick discharge after update.

How to update the firmware correctly:

1. Install the latest version of the Mi Home app (for Mi True Wireless) 2S and newer) or Mi Earphones (for older models).
2. Connect the headphones to the phone and open their profile in the application.
3. If an update is available, follow the on-screen instructions. Don't turn off Bluetooth or close the app until it's complete!

If after the update, one headphone stopped working:

• 🔄 Reset your settings (see Section 2).
• 📱 Try rolling back the firmware by connecting the headphones to your PC using the Mi Flash Tool (for advanced users only!).
• 📧 Contact Xiaomi with error logs (you can get them in Mi Home in the Feedback section).

External factors: moisture, falls and magnetic interference

Mi True Wireless headphones don’t have an official water protection certificate (IPX), So even a little moisture can make them go down:

• 💧 Moisture or sweat – corrosion of contacts, short circuit.
• 🍃 Dust and dirt – clogging of a speaker or microphone.
• 🧲 Magnetic interference – Bluetooth crashes near microwaves, routers 5G.
• 🚀 Falls and impacts - the separation of plumes, cracks on the board.

What to do if the headphones were in the rain or they got sweat:

1. Turn them off immediately and remove them from your ears.
2. Dry with a fan (not a hairdryer!) for 12-24 hours.
3. Put in a bag with silica gel (packages from shoe boxes).
4. Do not turn it on until it is completely dry!

If the headphone fell and stopped working:

• 🔍 Check the case for cracks (especially near the hinges).
• 🔊 Look, there's no crunch or noise in the dynamics.
• 🛠️ If the headphone is disassembled - check if the plumes have moved away from the board.

⚠️ Warning: If the earphone starts to warm up or smells like burns after falling, don't use it.

8.When to contact the service: signs of irreparable breakdowns

Not all malfunctions can be fixed by yourself. Here are the cases when you should contact the Xiaomi service center or workshop:

• 🔥 The earphone is warming or smells of a burn.
• 🔋 The battery swelled (seems to be over the bloated body).
• 🎛️ The speaker wheezes or does not make sounds after cleaning.
• 📡 The headphone is not defined by any device.
• 💦 After the moisture hit, it passed. >48 hours, but the earphone is not working.

Average prices for repairs in informal services (2026):

Where to repair:

• 🏢 Xiaomi Official Service Centers – Warranty Repair (if Headphones are younger) 1 List of the website mi.com/ru/service/center.
• 🔧 Unofficial workshops are cheaper, but without a guarantee.
• 🛒 Replacement with new ones – if repairs are worthwhile >50% of the price of new headphones (relevant to Mi True Wireless Basic 2, which cost more than half the price of the new headphones). ~2 000 ₽).

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Before visiting the service, reset your headphones and check them on another device, which will eliminate software errors and save time for masters.

FAQ: Frequent questions about Xiaomi headphones that don't work