How to connect several Bluetooth devices to a Xiaomi phone: Limitations MIUI roundabouts

Modern smartphones Xiaomi on the basis MIUI You can connect multiple Bluetooth devices, from headphones and fitness bracelets to keyboards and game controllers, but many users face unexpected limitations: The phone only sees one device, the sound is transmitted to the speaker, then to the headphones, and some gadgets completely refuse to work at the same time. 2026 year, including hidden settings MIUI 14/15, Workarounds for Old Models and Solving Typical Problems.

It’s important to understand that despite marketing claims about “supporting multiple devices,” the real behavior of the system depends on the firmware version, smartphone model, and types of connected gadgets.+ It can easily manage headphones and smart watches at the same time, while Poco can control the headphones and smart watches at the same time. X3 NFC It can be a bit of a bug when you try to plug in a speaker and a gamepad. We've tested over 15 combinations of devices on different versions. MIUI — The results are summarized in the table below.

If you’re trying to sync two audio devices (e.g., headphones and a speaker for sharing music) with your Xiaomi phone, prepare for disappointment: simultaneous audio transmission to multiple sources. MIUI It's disabled by default, but there are ways to get around that limitation, from using special applications to changing system files (for advanced users.

What devices can be connected at the same time: official restrictions MIUI

Xiaomi does not advertise strict restrictions on the number of connected Bluetooth devices, but they exist and depend on:

• 📱 Smartphone models are flagships (Xiaomi) 14 Ultra, Mix Fold 3) support 7 The same system, budget (Redmi) 12C) — more 3-4.
• 🔄 Versions MIUI — into MIUI 14+ There is a “Double Audio” option (but it doesn’t work with all gadgets).
• 🎧 Types of gadgets – audio devices (headphones, speakers) conflict with each other more often than, for example, the keyboard + mouse.
• 🔋 Bluetooth versions - Bluetooth 5.2/5.3 (In new models, it handles multiple connections more stable than Bluetooth 4.2 (old Redmi).

Xiaomi’s official documentation mentions the following restrictions:

⚠️ Note: If you connect two audio devices (e.g. AirDots and Mi Portable Speaker), the default audio will only be transmitted to the last one. To listen to music simultaneously on both, you will need to turn on the "Double Audio" mode (Settings) → Connections → Bluetooth → Additional) or use third-party applications.

Step-by-step: how to connect several devices via Bluetooth

Let's start with the basic scenario of connecting two or more gadgets to a Xiaomi smartphone without the use of additional applications. MIUI 12 and newer, but may require a phone to restart when first connected.

Turn on Bluetooth on all your gadgets|Make sure the devices are charged (minimum 30%)|Disable previously paired devices if they are not needed|Update the firmware MIUI last-minute-->

Algorithm of action:

1. Open Settings → Connections → Bluetooth and activate the switch.
2. Click "Search for devices" and wait until the desired gadgets appear in the list.
3. Slip on the first device (such as Mi Band 8) and confirm pairing.
4. Repeat step 3 for the second device (e.g., Redmi Buds 4 wireless headphones).
5. If the sound is not transmitted to the desired gadget, open the notification panel and manually select the source of playback.

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If one of the devices is not determined, try resetting it (usually by pressing the power button on the device). 10-15 seconds and reconnect.

To play sound on two devices at the same time (e.g. headphones and a speaker):

1. Connect both audio devices according to the instructions above.
2. Open the Settings. → Connections → Bluetooth → Additionally.
3. Activate the option of "Dual audio" (on some models may be called "Duplicate audio").
4. Select both devices from the list and confirm synchronization.

⚠️ Warning: Double audio mode may cause audio delays (up to) 0.5-1 Seconds on budget models (Redmi) 10A, Poco M4 For games or watching videos, it is better to turn off this feature.

Problems and Solutions: Why Xiaomi Doesn’t See the Second Device

Even with the right connection, users are faced with common errors, and let's look at the most common ones and how to fix them.

Problem 1: The phone only sees one device, the second one doesn’t appear in the list.

• 🔌 Solution: Reboot both gadgets and smartphones. On some models, Xiaomi helps disable the Quick Connection feature in Bluetooth settings.
• 📱 Solution: Update firmware MIUI — older (MIUI 11 and below) there is a bug with a restriction of 1 active device.

Problem 2: The sound is transmitted to the headphones, then to the speaker, constantly switching.

• 🎵 Solution: Turn off the option "Automatic switching of audio devices" in Settings → Sound.
• 🔄 Solution: Manually set the priority device in Bluetooth settings (long press on the name of the gadget) → "Priority source").

Problem 3: Connected devices are constantly shut down or give an error.

• 🔋 Solution: Check the battery power of gadgets – at a level below 15% Xiaomi can forcibly break the connection.
• 📶 Solution: Turn off Wi-Fi or mobile data while you connect – sometimes interference from other wireless networks interferes with the stable operation of Bluetooth.

Special applications for managing multiple Bluetooth devices

If the standard settings MIUI They don't allow you to connect the right number of gadgets, and third-party apps come to the rescue:

• 🎧 Simultaneous music playback on two or more audio devices.
• 🎮 Connecting multiple gamepads for multiplayer games.
• 🖥️ Keyboard control + mouse + The tablet as a single workspace.

Top.-3 Proven applications for Xiaomi:

Instructions for setting up SoundAssistant (the most popular solution for dual audio):

1. Download the app from Google Play.
2. Open the Settings. → Multisound and activate the option.
3. Connect both audio devices via standard Bluetooth.
4. In the application, select both gadgets and click "Start".
5. Adjust the volume balance for each device.

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Applications like SoundAssistant don't remove the hardware limitations of Bluetooth, but emulate sound duplication. 10-15%.

Advanced settings: how to get around the restrictions MIUI for advanced users

If you’re ready to dive into the technical details, there are ways to extend the Bluetooth experience on Xiaomi by changing system files or using the same. ADB-These methods are suitable for power users and require an unlocked bootloader or root rights.

Method 1: Change the Bluetooth configuration file

File. /system/etc/bluetooth/bt_stack.conf It contains parameters that limit the number of connected devices:

1. Get root access (e.g. via Magisk).


2. Open the file in a text editor (e.g., Mixplorer).




3. Find the lines:


   MaxConnectedAudioDevices=1
   MaxConnectedDevices=7


4. Change the values to the desired ones (for example, MaxConnectedAudioDevices=2).




5. Save the file and restart the phone.

Method 2: ADB-team-reset

If root is not available, you can try temporarily changing the settings through ADB (Android Debug Bridge):

adb shell settings put global bluetooth_dual_audio_enabled 1


adb shell settings put global bluetooth_max_connected_audio_devices 2

These commands include dual audio support and increase the audio limit, and the effect is maintained until the next reboot.

⚠️ Warning: Incorrect editing of system files can result in loss of Bluetooth connectivity or cyclical phone restart.Before experimenting, back up your data via Settings → Additionally. → Backup.

How to check the stability of the connection: tests and diagnostics

After connecting several devices, it is important to make sure that they work stably.

1. Check the delay: Turn on the music and record the sound from the microphone at the same time. The time difference between the original and the recording should not exceed 200 ms.
2. Interference test: Get away from the phone 5-10 If the connection breaks, the power of the Bluetooth module is a problem.
3. Battery Monitoring: Open Settings → Battery → Battery usage and check if Bluetooth is using more than 10% of its charge per hour.

For automated diagnostics, use the following applications:

• 📊 Bluetooth Auto Connect – shows the stability of the connection in real time.
• 🔍 nRF Connect – Analyzes signal strength and supported profiles.
• 📈 GSam Battery Monitor – monitors battery consumption on Bluetooth.

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If one of the devices is permanently shut down, try changing the power saving mode for Bluetooth: go to Settings → Battery → Energy saving regime → Settings → Bluetooth and select "No Limitations".

Compatibility with smart devices Xiaomi: features of the connection

Xiaomi smartphones are optimized to work with the Mi Home ecosystem, but there are nuances when connecting several gadgets:

Smart watches and bracelets:

• 🕒 Mi Band 7/8 watch 2 Pro automatically disable other wearable devices when connected.
• 🔄 To use two trackers (for example, for sports and sleep), you will have to manually reconnect them to Mi Fitness.

Wireless headphones:

• 🎧 Xiaomi AirDots (all models) support connecting to two devices at the same time (e.g., a phone) + notebook, but the sound will only be transmitted to one.
• 🔊 To play simultaneously on AirDots and column, use the "Double Audio" or SoundAssistant mode.

Smart home:

• 🏠 Mi Home allows you to connect to the 100 devices to one hub, but directly via Bluetooth smartphone controls no more than 5-7 gadgets (sensors, lamps, sockets).
• 🔌 For stable operation, it is recommended to use Xiaomi Gateway instead of direct connection to the phone.

FAQ: Answers to Frequent Questions