Connecting wireless headphones to Xiaomi Mi9 via Bluetooth: a complete problem-solving guide

Wireless headphones have become an integral part of everyday life – they allow you to listen to music, answer calls and watch videos without entangled wires. However, Xiaomi Mi9 users sometimes face difficulties when connecting devices for the first time via Bluetooth. Unlike modern models with MIUI 14+, where the process is most automated, the Mi9 (released in 2019) may require additional adjustments due to the features of the firmware and the version of the Bluetooth 5.0 module.

In this article, we will analyze not only the standard pairing procedure, but also the nuances of working with popular headphone models (for example, Xiaomi AirDots, JBL Tune, Sony WH-1000XM3), as well as solve common errors like “device not found” or “connected, but no sound.” If you have already tried to connect headphones to your phone and faced problems, here you will find unique solutions for the Mi9 that do not work on new Xiaomi models.

Before you start, make sure your headphones are charged (the indicator should flash or burn green) and your phone is Bluetooth enabled. If you use Xiaomi headphones, check for MIUI compatibility - some models require an update to the headphone firmware through the Mi Home app.

1. Preparing the Xiaomi Mi9 phone for connection

Before you start pairing, you need to make sure that the Bluetooth module on the Mi9 works correctly, and this model often has a problem with “hanging” the adapter after prolonged use – especially if many devices were previously connected.

To avoid disruption:

1. Reboot your phone (hold the power button for 10 seconds).
2. Remove from your phone’s memory any previously coupled devices you no longer use (Settings) → Bluetooth → ⚙️ → Remove the device).
3. Update MIUI to the latest available version for the Mi9 (current at the time of writing - MIUI 12.5).

If you connect Xiaomi headphones, install the official app:

• 🎧 Mi Home – to update the firmware of headphones (for example, AirDots Pro 2).
• 🔊 Xiaomi Earphones – for gesture and equalizer settings (not working with all models).

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If after updating MIUI Bluetooth stopped working, reset the network settings: Settings → About phone → Reset settings → Reset settings Wi-Fi, mobile network and Bluetooth.

2. Step-by-step instruction: how to connect headphones

The pairing process on the Xiaomi Mi9 differs from the new models due to the MIUI 10/11/12 interface.

Step 1: Activate the search mode on the headphones:

• 🔋 For Xiaomi AirDots: Hold the button on the case of the charging case for 3-5 seconds until the indicator starts flashing red and white.
• 🎵 For JBL/Sony: It is usually enough to remove the headphones from the case or hold the power button.

Step 2. Turn on Bluetooth on the Mi9:

1. Open Settings → Connections and Sharing → Bluetooth.
2. Move the slider to the "On" position.
3. Click Device Search (in the upper right corner).

Step 3: Select the headphones from the list and confirm pairing. PIN-In the code, try the standard combinations:

• 🔢 0000 for most models.
• 🔢 1234 - for some headphones JBL.

Headphones are displayed in the list of connected devices|The indicator on the headphones is lit blue / green|The sound is played through the headphones (check in Settings). → Sound. → Output device)|Microphone is working (check through voice recording)-->

3. Typical errors and their solutions

Even if you follow the instructions correctly, Mi9 users may encounter problems.

Mistake 1: Phone can't see headphones

• ⚡ Check the charge of the headphones – if the indicator does not blink, connect the case to charge for 10 minutes.
• 🔄 Reboot the headphones: for AirDots, put them in the case, close the lid, then remove and hold the button on the case for 10 seconds.
• 📱 On your phone, turn on Flight Mode for 30 seconds, then turn off and repeat the search.

Error 2: Connected, but no sound

• 🔊 B Settings → Sound. → The output device select your headphones.
• 🎛️ Check the volume on the headphones themselves (for example, on Sony). WH-1000XM3 There is a separate regulator).
• 🔧 Reset Bluetooth Settings: Settings → Bluetooth → ⚙️ → Reset the settings.

Mistake 3: Permanent communication breakdowns

• 📶 Make sure there are no interference sources nearby (microwaves, other Bluetooth devices).
• 🔋 Headphones are discharged – charge them to 50% or more.
• 📱 Update the firmware of headphones through the branded app (for example, JBL Headphones or Sony Headphones Connect).

4. Features of connecting headphones of different brands

The pairing process may vary depending on the headphone manufacturer, and the following are the key nuances for popular models:

For headphones Xiaomi (for example, AirDots Pro 2 or FlipBuds Pro) is recommended to use proprietary software. For example, in the Mi Home application you can:

• 🔄 Update the firmware of headphones (critical for stable operation with the Mi9).
• 🎛️ Set up touch gestures (double touch, hold).
• 🔋 View the charge level of each headphone separately.

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Apple AirPods on Xiaomi Mi9 will only work in A2DP mode (without HFP support for calls).

5. Sound adjustment after connection

After successful pairing, check the sound quality. On the Mi9, additional settings are available that will improve playback:

Bluetooth codecs

By default, the Mi9 uses an SBC codec that provides average quality to enable AAC or aptX (if the headphones support them):

1. Open Settings → Connections and Sharing → Bluetooth.
2. Press on. ⚙️ near the connected headphones.
3. Choose Sound Quality → High (AAC/aptX).

equalizer

MIUI has a built-in equalizer, but it doesn't work with all headphones, and the alternative is apps like Wavelet or Poweramp that support:

• 🎶 Frequency settings (bass, high frequencies).
• 🔊 Virtualization of surround sound.
• 🎵 Presets for different genres of music.

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If the codec changes, the sound starts to break, go back to SBC, which is the most stable on the Mi9 with Bluetooth 5.0.

6. How to turn off and reconnect headphones

If you need to temporarily turn off your headphones (for example, to save charge), do it correctly to avoid problems the next time you connect.

Quick shutdown

• 🔌 Just put the headphones in the case (for AirDots) or turn them off with the power button.
• 📱 On the phone: Settings → Bluetooth → Press the device. → Shut down.

Reconnection

On the Mi9, headphones must be connected automatically when:

• 🔋 Extracts from the case (for AirDots).
• 🎵 Activation of the power button (for JBL/Sony).

If the autoconnection is not working:

1. Remove the device from the Bluetooth list.
2. Reboot the phone.
3. Repeat the process of pairing from scratch.

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Xiaomi headphones may not automatically connect if at least one headphone is left in the case.

7. reset Bluetooth settings on Xiaomi Mi9

If none of these things work, reset the Bluetooth module completely, and that will remove all the associated devices and return the settings to factory settings.

Soft reset (saves some settings):

1. Open Settings → Bluetooth.
2. Press on. ⚙️ top-right.
3. Choose Reset settings.

Hard reset (total deletion of Bluetooth data):

1. Go to Settings → About the phone → Reset settings.
2. Select Reset Wi-Fi, Mobile Network and Bluetooth settings.
3. Confirm the action and restart the phone.

⚠️ Warning: Hard reset will also remove stored Wi-Fi networks and mobile internet settings!

8. Alternative ways of connecting

If Bluetooth on the Mi9 is unstable, consider alternative headphone connectivity options:

Through Bluetooth 5.0 adapter

Some users use an external USB-C Bluetooth adapter (such as the Avantek or TP-Link UB500).

• 🔌 Built-in Bluetooth module damaged.
• 🎵 I need an aptX codec. HD or LDAC (not supported by native Mi9).

For this:

1. Connect the adapter to the USB-C port of the phone.
2. Put the headphones in pairing mode.
3. Connect to the adapter as a normal Bluetooth device.

Through AUX-cable (3.5 mm)

If your headphones support wired connectivity, use a USB-C → 3.5mm adapter (such as the original one from Xiaomi).

• 🔊 The sound quality will be higher than Bluetooth (no compression).
• 🔋 The charge of the phone will be used faster.

⚠️ Attention: On Xiaomi Mi9 No built-in 3.5 mm connector, you need an adapter, and poor adapters can cause noise or breaks in sound.

FAQ: Frequent questions about connecting headphones to Xiaomi Mi9