Connecting wireless headphones to Xiaomi Redmi 9 Pro over Bluetooth: the full guide

Wireless headphones have become an integral part of everyday life: they are convenient for listening to music, podcasts, audiobooks or calls. However, users of the Xiaomi Redmi 9 Pro often have questions about the correct connection of the headset via Bluetooth. Even if the process seems intuitive, nuances like the version of the protocol, codec compatibility or features of MIUI can complicate the task.

In this article, we will not only look at the basic pairing steps, but also look at typical problems, from lack of sound to permanent connection breaks. We will focus on the settings of the Redmi 9 Pro, which affect the quality of audio transmission. If you have tried to connect headphones but encountered an error, here you will find solutions for most scenarios.

First, make sure your headphones are charged and paired. The Redmi 9 Pro uses Bluetooth 5.0, which supports modern audio codecs like AAC, aptX and LDAC (when available in the headphones), which ensures stable connection and high sound quality - but only if everything is set up correctly.

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1. Preparation of headphones and phone for connection

Before pairing, check two key points: the condition of the headphones and the settings of the phone. Most problems arise from missed preparatory steps. For example, if the headphones are discharged or the phone is in power saving mode, Bluetooth may not work.

For Redmi 9 Pro, it is critical to update the firmware to the latest version of MIUI. In older versions, there were bugs with connecting devices on Qualcomm chips (namely, it is built on Redmi 9 Pro). The update solves 80% of pairing problems. You can check the relevance of the software in the Settings menu → About the phone → System Update.

Also, disable other Bluetooth-connected devices (fitness bracelets, speakers, smartwatches) that can cause interference, especially if they use the same A2DP protocol to transmit audio.

• 🔋 Headphone charge: Make sure the charge level is above 30%.Some models (e.g. Xiaomi AirDots) automatically turn off when the charge is low.
• 📱 Flight mode: Turn it off - otherwise Bluetooth won't work.
• 🔄 Reboot: If you have previously crashed, reboot both your phone and headphones.
• 🎧 Pairing mode: In most headphones, it is activated by a long press on the power button (until the indicator flashes).

⚠️ Note: If you connect Apple AirPods or Sony headphones WH-1000XM4, Additional software may need to be installed. MIUI It does not always recognize profiles correctly. AAC for other brands.

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2. Step-by-step instructions: how to connect headphones to Redmi 9 Pro

Now, to the interface process itself, the Redmi 9 Pro takes less than a minute to follow the algorithm, and it's important to keep steps in mind, for example, many users forget to turn on the visibility of the phone to other devices.

Open Settings and go to Connections and Sharing → Bluetooth. Activate the slider at the top of the screen. Your phone will start scanning the available devices. Your headphones should show up in a list with the model name (e.g. Mi True Wireless Earphones 2).

Click on the headphone name in the list. If necessary, confirm pairing on both devices (sometimes you need to press the button on the headphones or type in the headphones). PIN-The code is usually 0000 or 1234. Once you've successfully connected, the name will be marked "Connected".

Activated Bluetooth on the phone|Headphones in pairing mode|We can see the phone for other devices|No active connections to other gadgets|Updated firmware MIUI-->

If the headphones don’t appear in the list, try the following:

1. Turn off and turn on Bluetooth on your phone again.
2. Reset the headphones (usually by pressing the power button for 10 seconds).
3. Make sure that the distance between the devices does not exceed 1 meter.

Xiaomi/Airdots|Apple AirPods|Sony|JBL|Samsung|Others-->

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3. Customize sound and codecs for better quality

Once you have the Redmi 9 Pro headphones on, you automatically choose the audio codec, but it's not always the best choice. For example, the SBC codec (basic) is compatible, but it's inferior in quality to aptX or AAC. To change the codec, you'll need a MIUI developer or third-party software like Bluetooth Auto Connect.

Check the current codec in the Settings menu → Connections → Bluetooth → ⚙️ (settings next to the headphone name) → Sound quality, if aptX is available or LDAC, Please note that some codes require support from headphones.

For music lovers, we recommend you turn on the "Absolute Volume" option in your Bluetooth settings, which synchronizes the volume levels on your phone and headphones to prevent distortion of sound, but note that when you activate this feature, you can increase the latency of sound in games or videos.

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If you hear noise in your headphones, try turning off your phone's Wi-Fi, because the Redmi 9 Pro uses a single antenna for Bluetooth and Wi-Fi at 2.4 GHz, which can cause interference.

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Typical problems and their solutions

Even after a successful connection, Redmi 9 Pro users face typical problems such as connection breakdowns, lack of sound, or poor audio quality.

Problem 1: Headphones are connected, but there is no sound

• Check if the headphones are selected as the audio output device in the notification panel (swipe down → speaker icon).
• Restart your phone – sometimes the audio driver freezes.
• Turn off the Dual App Audio feature in Bluetooth settings (it duplicates sound across multiple devices).

Problem 2: Permanent connection breaks

• Make sure there are no obstacles between the phone and the headphones (walls, metal objects).
• Turn off charge saving for Bluetooth in the Settings menu → Battery → Charge saving → Applications.
• Update the firmware on the headphones (if available). For example, for Xiaomi AirDots Pro 2, updates come through the Mi Home app.

⚠️ Note: If the headphones turn off when the screen is locked, check the settings Settings → Display. → Sleep mode: Some power saving modes force Bluetooth to shut down.

Problem 3: The sound is interrupted or distorted

• Try changing the audio codec to SBC, which is less demanding for connection stability.
• Turn off uniform playback (EQ) in the player – it can overload the Bluetooth codec.
• On Redmi 9 Pro with firmware below MIUI 12.5, there's an aptX codec bug -- the sound can break at volume above 70 percent. AAC.

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5. Optimizing Connection for Games and Videos

For gamers and video enthusiasts, latency is critical. On the Redmi 9 Pro, it depends on the codex and Bluetooth version chosen. For example, aptX Low Latency reduces latency to 40 ms, but not all headphones support.

To reduce the lag:

1. Enable game mode in Bluetooth settings (if available).
2. Use headphones with support for aptX LL or LC3 (for example, Xiaomi FlipBuds Pro).
3. Close background apps, especially instant messengers with voice messages.

To watch videos on YouTube or Netflix, we recommend turning off hardware acceleration in the app settings, which reduces the load on the processor and reduces the likelihood of sound and picture being out of sync.

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6. How to disable or remove headphones from your phone memory

If you're not planning on using your headphones anymore, or if you want to connect them to another device, you need to remove them from the conjugated list, and that also helps with crashes -- sometimes reconnecting them solves problems.

To remove the headphones:

1. Open Settings → Connections → Bluetooth.
2. Find your headphones in the list and click on ⚙️ (squirrels near the name.
3. Select "Forget this device" and confirm the action.

After removal, the headphones will automatically go into pairing mode the next time you turn on. If this does not happen, reset them to the factory settings (usually by pressing the power button for 15-20 seconds before flashing red and blue indicators).

⚠️ Note: On some headphones (for example, JBL Live 660NC) The reset is done through a special application, without which the device may not appear in the list of available for connection.

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7. Compatible with different headphone models

The Redmi 9 Pro supports most wireless headphones, but there are nuances with individual brands.Apple AirPods connect without problems, for example, but may not display charge levels in Bluetooth status.And Sony WH-1000XM4 headphones require manual selection of the LDAC code for maximum quality.

The table below shows the compatibility of popular models with the Redmi 9 Pro:

For active noise cancellation (ANC) headphones on the Redmi 9 Pro, you may need to adjust your microphones further. If the person is not hearing you during calls, turn off the ANC or use the headphones in Transparency mode.

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8 Additional Features: Multi-connection and Auto-connection

The Redmi 9 Pro supports multi-connection, which allows you to connect your headphones to your phone and other device at the same time (for example, a laptop), but for this, the headphones must support a Multipoint profile (for example, the Sony WH-1000XM5 or Jabra Elite 4).

To activate multi-connection:

1. Connect the headphones to the first device (e.g. Redmi 9 Pro).
2. Activate the pairing mode on the headphones (usually double pressing a button).
3. Connect them to the second device via Bluetooth.

For convenience, you can configure the headphones auto-connect when you turn on Bluetooth. MIUI It's done this way:

1. Open Bluetooth settings.
2. Press on. ⚙️ headphone-name.
3. Enable the option "Automatic connection".

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Multiconnection works only with headphones that support Bluetooth 5.0+ and Multipoint profile. On the Redmi 9 Pro, you can connect up to 2 devices to one headphone at a time.

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FAQ: Frequent questions about connecting headphones to the Redmi 9 Pro