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

Wireless headphones have become an integral part of everyday life – they are convenient for listening to music, calling and even watching videos. Owners of the Xiaomi Redmi Note 9 Pro often face questions: how to sync devices correctly, what settings optimize sound and what to do if the connection is interrupted. In this article, we will analyze all the nuances of connection, from basic synchronization to solving typical problems.

The Redmi Note 9 Pro features a Bluetooth 5.0 module that provides a stable connection to most modern headphones, from the budget Xiaomi Mi True Wireless Earphones to the premium Sony WH-1000XM4. However, even with this technique, users sometimes face difficulties: the phone does not see headphones, the sound is interrupted or there are delays.

1. Connection Preparation: What to Check Before Synchronization

Before you start connecting, make sure both devices are ready to go. Let's start with the Redmi Note 9 Pro:

• 🔋 Battery charge: Phone should have a charge level of at least 20%.In low charge, the system can automatically turn off Bluetooth to save energy.
• 📱 Software Update: Check the relevance of firmware in Settings → The phone. → System Update: Outdated software can cause Bluetooth malfunctions.
• 🎧 Headphone compatibility: Make sure your headphones support Bluetooth 4.2 or higher. Models with older versions (e.g. Bluetooth 2.1) may not connect or may be jammed.

Now on the headphones:

• 🔄 Pair mode: Most wireless headphones require activation of the search mode (usually by holding the power button or a special key).Check the instructions for your model - for example, AirDots you need to hold the touch panel for 3 seconds.
• 🔋 Battery charge: Discharged headphones won't show up on the list of available devices. Charge them to at least 30%.
• 📦 Resetting: If the headphones have previously connected to another device, reset (usually via a button combination – see manufacturer’s instructions).

⚠️ Note: If you use Xiaomi headphones (for example, Mi True Wireless Earphones 2), before connecting, install the official Mi Earphones app from Google Play.

Step-by-step: how to connect headphones to the Redmi Note 9 Pro

The connection process takes no more than 2-3 minutes, if you follow the algorithm:

1. Activate Bluetooth on your phone: Swipe your finger down the screen to open the Quick Settings panel, and tap the Bluetooth icon (or go to Settings → Connections → Bluetooth).
2. Put the headphones in pairing mode: For most models, this is holding the power button until the indicator flashes (usually blue/white). For example, for Redmi Buds 3 Pro, you need to hold the touchpad on both headphones for 5 seconds.
3. Find headphones in the list of devices: In the Bluetooth menu on the phone, the name of your headphones (for example, Mi True Wireless Earphones) will appear.
4. Confirm pairing: A request for code confirmation (usually 0000 or 1234) may appear on the screen. Enter it if required.

Once you've successfully connected, the headphones will be labeled "Connected," and the status bar will have a Bluetooth icon, and you can play the sound.

⚠️ Warning: If the headphones don’t appear on the list, try turning off and re-enable Bluetooth on your phone. Also check if the headphones are connected to another device (for example, a laptop or tablet) – some models do not support multithreaded connection.

3. Sound tuning: how to improve the quality of playback

By default, the Redmi Note 9 Pro uses the standard A2DP (Advanced Audio Distribution Profile) sound profile, but it can be optimized.

• 🎵 Bluetooth Codecs: Go to Settings → Connections → Bluetooth → Settings (cog next to headphones) → Sound quality. Choose aptX or AAC for better sound (if the headphones support these codecs).
• 🔊 Equalizer: In the Music (or Google Play Music) app, open the equalizer settings and select a preset for your genre (e.g. Bass for hip hop or Clarity for vocals).
• 🎧 Monosound: If one earphone is quieter, turn on Mono mode in Bluetooth settings (useful for sound balance issues).

For headphones Xiaomi is available additional features through the Mi Earphones app:

• 🔄 Control gestures: Set up a double touch to play/pause or switch tracks.
• 🔇 Noise suppression: Activate the mode ANC (Active Noise Cancelling if your model supports it (e.g. Redmi Buds 3 Pro).
• 📊 Firmware Update: Check for updates for headphones in the section Branded Software.

💡

If the sound is interrupted while watching the video, turn on Low Latency in Bluetooth settings. This will reduce lag, but may slightly degrade the sound quality.

Typical problems and their solutions

Even after a successful connection, Redmi Note 9 Pro users sometimes face difficulties.

🔌 Headphones don't plug in.

• 📱 Reboot the phone: Sometimes a basic reboot helps.
• 🔄 Reset Bluetooth Settings: Go to Settings → System system → Reset → Reset network settings (this will delete all saved devices).
• 🛠️ Update the firmware of headphones: For Xiaomi models, use the Mi Earphones app.

🎵 The sound is interrupted or distorted

• 📶 Remove interference: Get away from Wi-Fi routers, microwaves or other 2.4GHz devices.
• 🔋 Check the charge of headphones: At low charge (<15%) There may be surges of sound.
• 🎧 Change the codec: In Bluetooth settings, select SBC Instead of aptX if there is interference.

🕒 Large sound delay (lag)

• 🎮 Enable Game Mode: In Bluetooth settings, activate the Low Latency option.
• 📱 Close background apps: Especially those that use a microphone or Bluetooth (such as Zoom or Discord).
• 🔄 Reconnect the headphones: Sometimes re-pairing helps.

5 How to connect headphones to two devices at the same time

The Redmi Note 9 Pro supports Dual Audio (some firmware calls it Double Audio), which allows you to connect your headphones to two sources at once, for example, you can listen to music from your phone and take calls on your laptop at the same time.

1. Connect the headphones to the first device (for example, to the Redmi Note 9 Pro).
2. Activate the pairing mode on the headphones (usually double pressing the power button or holding the touch panel).
3. On a second device (like a laptop), turn on Bluetooth and find the headphones in the list. Confirm the connection.
4. On Redmi Note 9 Pro, go to Settings → Connections → Bluetooth → Additional → Dual Audio and enable the option.

Important: not all headphone models support multithreaded connectivity, for example, AirPods can work with only one Apple device, and Xiaomi Mi True Wireless Earphones 2 – with two, but with restrictions (sound will be played from only one source).

⚠️ Note: Dual Audio may increase the latency or decrease the quality of the sound. For stable operation, it is recommended to connect the headphones to only one device.

6. Alternative ways to connect: if Bluetooth does not work

If Bluetooth on the Redmi Note 9 Pro fails to work (for example, due to a hardware malfunction), alternative methods can be used:

• 🎵 Bluetooth Adapter: Connect an External Bluetooth Adapter via USB-C (For example, TP-Link UB400). The phone recognizes it as a normal Bluetooth device.
• 🔌 3.5mm audio cable: If your headphones support wired connectivity (e.g. Sony) WH-1000XM4), use the adapter USB-C → Note that the Redmi Note 9 Pro does not have a built-in audio jack, so the adapter is mandatory.
• 📡 FM-transmitter: You can use the device to connect to a car tape recorder FM-Adapter, but the sound quality will be worse than Bluetooth.

For the Bluetooth adapter:

1. Connect the adapter to the USB-C port of the phone.
2. Put the headphones in pairing mode.
3. In Bluetooth settings, select the adapter as the sound source.

💡

If the Bluetooth on your phone is completely out of order, the only reliable way is to use a wired connection via an adapter or external adapter.

7. How to reset Bluetooth settings on Redmi Note 9 Pro

If the headphones are connected with errors or the phone does not see the device, resetting Bluetooth will help, which will remove all the saved devices and return the settings to the factory.

Instructions:

1. Go to Settings → System → Reset.
2. Select Network Resetting.
3. Confirm the action (you may need to enter a pattern lock or password).
4. After restarting the phone, reconnect the headphones.

If the reset didn’t work, try clearing the Bluetooth cache:

1. Go to Settings → Applications → Application Management.
2. Find Bluetooth in the list of system applications.
3. Select Warehouse. → Clear the cache.
4. Reboot the phone.

Frequently asked questions