Connecting wireless headphones to Xiaomi Redmi 9T Bluetooth: A Complete Guide with Tips

Wireless headphones have become an integral part of everyday life – they are convenient for listening to music, podcasts or calls without confusing wires. 9T Sometimes you have difficulty with the first connection: the phone does not see the device, the sound is interrupted or the headphones turn off after a few minutes. In this article, we will analyze not only the basic pairing instructions, but also the nuances that the manufacturer does not see in the official documentation.

Feature of Redmi 9T — Bluetooth 5.0 support, which should theoretically provide a stable connection at a distance of up to 10 meters, but in practice, the quality of communication depends on the firmware version, the model of headphones and even the surrounding radio interference. We tested the connection with popular models – from budget Redmi AirDots to premium Sony WH-1000XM4 — And they found universal steps that work 95 percent of the time, and if you've tried to connect devices and you've encountered an error, skip the first partition and go straight to problem solving.

Preparation: What to check before connecting

Before you start pairing, make sure both devices are ready to communicate. 9T Bluetooth should be on and the headphones should be in search mode (usually activated by a long press on the power button:

• 🔋 Charge the headphone battery: if the level is below 20%, they can turn off during pairing. Charge them to at least 50%.
• 📱 Updates MIUI: in older versions of the firmware (below) MIUI 12.5) there are Bluetooth bugs. Check the relevance in Settings → The phone. → Updating the system.
• 🎧 Resetting headphones: If they were previously connected to another device, reset (the instruction is usually in the headphone manual).
• 📡 Interference: Turn off nearby wireless speakers, Wi-Fi routers at 2.4 GHz or microwave ovens – they create interference.

Pay special attention to the energy saving mode on Redmi 9T. If it's activated, the phone can restrict the background Bluetooth operation, which leads to communication breakdowns:

1. Open the settings → Battery and performance.
2. Select Power Saving Mode and turn it off.
3. Reboot your phone (this will reset the Bluetooth module cache).

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If the headphones support the codec AAC or aptX, turn them on in Bluetooth settings for better sound. To do this, after connecting, click on the gear icon next to the headphone name in the list of devices.

Step-by-step: how to connect headphones to Redmi 9T

The pairing process takes less than a minute if you follow the algorithm, and we break it down into steps with explanations for each step.

Step 1: Activate Bluetooth on your phone

Open the Quick Settings panel with your finger down the screen. Find the Bluetooth icon (stylized "B") and click on it. If there is no icon, turn the panel around and pull it down again. Alternatively, you can:

1. Go to Settings → Connections and Sharing → Bluetooth.
2. Move the slider to the "On" position.
3. Wait until the phone starts scanning the available devices (the indicator is a rotating search icon).

Step 2: Transfer the headphones to pairing mode

Different headphone models have different search activation processes, and here are the universal ways for popular brands to activate:

If your model is not in the table, look for the "Pairing mode" or "Bluetooth connection" section in the manual. This is usually a long press (3-10 seconds) on the main button.

Step 3: Finding and connecting headphones

After activation of the pairing mode on the headphones, their name should appear in the list of available devices on Redmi. 9T. If it didn't happen:

Turn off and turn on Bluetooth on your phone again

Reboot your headphones (turn them off and turn them on again)

Make sure the headphones are not connected to another device

Check the distance – it should be no more than 1 meter-->

When the headphones appear on the list, click on their name. PIN-The code is very rare (but it happens in older models), the standard code is 0000 or 1234. Once successfully connected, the name will be marked "Connected" or the tick icon.

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If the headphones support multipoint (simultaneous connection to two devices), the MIUI This can be unstable. Turn off the function in the headphone settings for reliability.

Adjusting the sound after connecting

By default, Redmi. 9T Uses a standard profile A2DP So you can stream audio, but you can optimize the sound to your preferences:

• 🎵 Bluetooth Codecs: Go to Bluetooth Settings → Headphones → Sound settings and select SBC (universal), AAC (Better for Apple Music or aptX (for high bitrate).
• 🔊 Equator: In Settings → Sound. → Select Preset equalizer (e.g. Bass or Jazz) or adjust frequencies manually.
• 🎧 Mono/Stereo: If the sound is only in one headphone, check the Bluetooth settings for the Stereo mode (sometimes confused with Mono after updates).

For owners of Redmi AirDots or Mi True Wireless Earphones, additional features are available in the Mi Home app:

1. Install Mi Home from Google Play.
2. Add headphones as a new device (they must be connected to the phone).
3. In the device menu, activate: 🔇 Noise reduction (if supported by the model). 🎤 Improved voice for calls. ⏱ Auto-disconnection in inactivity.

Problem Solving: Headphones are not connected or turned off

Even with the right pairing, there can be failures, and we've collected common errors and ways to fix them based on feedback from Redmi users. 9T.

Problem 1: The phone can't see the headphones

If the name of the headphones does not appear in the list of devices:

⚠️ Attention: On Redmi 9T firmware MIUI 13+ There is a bug where Bluetooth does not detect devices after rebooting. Solution - disable Quick Connection in Bluetooth settings.

• 🔄 Reboot both devices: Turn off the headphones, restart the phone, then try again.
• 📵 Network reset: go to Settings → Connections and sharing → Reset the network and select "Reset settings Wi-Fi, mobile network and Bluetooth".
• 🛠 Cleaning up Bluetooth cache: Open Settings → Annexes → Application management. Find "Bluetooth" in the list of system applications. Press Storage. → Clear the cache.

Problem 2: Headphones are connected, but there is no sound

The reasons can be both software and hardware:

• 🔊 Check the volume: on Redmi 9T You have separate regulators for media and calls, and make sure that the media slider is not at zero.
• 🎵 Bluetooth Profile: Sometimes the phone connects in Voice Call mode" (HFP) instead of "Music" (A2DP). To change your profile: Open Bluetooth Settings. Click on the gear icon next to your headphones. Select Use for Media.

Testing on another device

Issue 3: Persistent communication breakdowns

On the Redmi. 9T With the Snapdragon 662 processor there is a hardware feature: when used actively GPS (For example, in a navigator, Bluetooth is starting to get jammed because of a conflict of radio modules:

• 📍 Turn it off. GPS: If you do not use navigation, deactivate geolocation in the Quick Settings Panel.
• 🔄 Change the Wi-Fi frequency: If your phone is connected to Wi-Fi at 2.4 GHz, switch to 5 GHz, this will reduce interference.
• 🔋 Turn off battery optimization for Bluetooth: Go to Settings → Battery and performance → Battery Optimization. Find "Bluetooth" in the list and select "No Limits.

Advanced settings: how to improve the quality of communication

If you use headphones to listen to high quality music or for gaming sessions, standard settings may not be enough.

1.Setting up Bluetooth codecs

By default, Redmi. 9T codec SBC, It's a medium-quality sound, if your headphones support you. AAC, aptX LDAC, manually:

1. Put the headphones on the phone.
2. Open Settings → Connections and Sharing → Bluetooth.
3. Click on the gear icon next to the headphones' name.
4. Select Sound Settings → Bluetooth codec.
5. Try it in turn: AAC — Best balance of quality and stability. aptX is a high bitrate, but can slow down video. LDAC — Maximum quality (up to 990 kbps) but requires a powerful battery.

After changing the codec, restart the music playback - the changes do not apply immediately.

2. Optimization for games and video

When watching videos or playing games, latency is important to reduce:

• 🎮 Game mode: activate it in Settings → Special facilities → Turbo mode. This reduces Bluetooth latency by 20 to 30 milliseconds.
• 📺 Synchronization of sound: in some players (for example, VLC) You have a manual delay setting. Experiment with the values from -50 before +100 miss.
• 🔌 Disable other Bluetooth devices: If you have a smartwatch or speaker connected to your phone, they put extra load on the module.

3. Savings in headphone charge

To extend the battery life of the headphones:

• 🔋 Turn off noise cancellation if you don’t need it, which cuts your consumption by 15-20%.
• 📴 Reduce bitrate: in the codec settings, select SBC instead LDAC.
• ⏱ Auto-Disable: In the manufacturer’s app (such as Mi Home or Sony Headphones Connect), set up an inactivity timer.

Alternative ways of connecting

If Bluetooth doesn’t work for some reason, consider other options for connecting headphones to Redmi. 9T.

1. via Bluetooth adapter (if the module is broken)

If the phone is faulty Bluetooth module, you can use an external USB-supportive adapter OTG. For that:

1. Buy an adapter. USB-C → 3.5 mm (officially from Xiaomi or certified).
2. Connect the wired headphones to the adapter and the adapter to the phone.
3. In the sound settings, select the output to "Wired headphones".

The downside of this method is the loss of portability, but you get a stable sound without delay.

2. Connection through manufacturer's applications

Some brands (such as Sony or Bose) require the installation of proprietary software to work properly. WH-1000XM4 needle:

1. Download Sony Headphones Connect.
2. Connect the headphones to the phone via Bluetooth.
3. In the appendix set up: 🎧 Sound profiles (e.g., "Bright" or "Excited"). 🔇 Noise reduction level. 🔊 equalizer.

3. Use of two headphones at the same time (Dual Audio)

Redmi 9T It supports Dual Audio, which allows you to connect two Bluetooth devices (such as headphones and speakers) for synchronous playback:

1. Connect the first device (for example, headphones).
2. Open Bluetooth Settings and click on the three dots in the upper right corner.
3. Select Dual Audio.
4. Connect the second device.
5. Activate the sound synchronization.

⚠️ Note: Dual Audio may cause up to 200ms of latency, but this feature is not suitable for gaming or video.

Frequent questions