Why Xiaomi phone doesn’t connect to Bluetooth speaker: A complete troubleshooting guide

You try to connect a Xiaomi smartphone to a wireless speaker, but the devices stubbornly “don’t see” each other or the connection breaks after a few seconds? This problem is familiar to many owners of MIUI-based phones – from budget Redmi to flagship Xiaomi 13/14. 80% of cases are not hardware malfunctions, but software failures, conflicts of Bluetooth profiles or hidden power saving restrictions.

In this article, we'll look at all the possible causes, from the banal (discharged speaker) to the exotic (conflict with HyperOS firmware), you'll learn how to diagnose a problem by symptoms, what MIUI settings interfere with stable connection, and what to do if the phone forgets the column after rebooting. And for owners of older models (Redmi Note 8/9, Mi A2), we'll give you individual solutions - their Bluetooth 4.2/5.0 chips often conflict with modern speakers.

Warning: if your Xiaomi does not see any Bluetooth devices (earphones, fitness bracelets, car radio), the problem is more hardware - read the section on the diagnostics module. If the difficulties are only with the column, start by checking the list below.

1. Basic checks: 5 steps before setting up

Before you dig into MIUI settings, make sure that the problem isn't the basics. According to service centers, 30% of Bluetooth calls are solved at this point.

• 🔋 Column charge: Make sure the speaker is at least 20% charged. Many models (e.g. Xiaomi Mi Portable Speaker) turn off Bluetooth when the charge is low, although the indicator is still on.
• 🔄 Reboot: Turn off and turn on the speaker (power button 3-5 seconds). Do the same with the phone - it will reset the cache of the Bluetooth module.
• 📱 Flight mode: Check if the flight mode is activated in the notification curtain. It turns off all wireless modules, including Bluetooth.
• 🔗 Interconnection: If the speaker is already connected to another phone/laptop, disconnect it from there. Most budget models only support one active connection.
• 📡 Distance and obstacles: Make sure there are no thick walls or metal objects between the phone and speaker.The maximum distance for Bluetooth 5.0 is 10 meters (in practice often less than that).

If you don't have a speaker on the list of available devices after this manipulation, move to the next section, and if the phone "sees" the speaker but doesn't connect, skip Section 2 and read about Bluetooth profile conflicts.

2. Hidden MIUI settings that block Bluetooth

MIUI is known for aggressive background and power optimization, which often breaks Bluetooth.

Optimizing the battery for Bluetooth

By default, the system limits the background activity of the Bluetooth module.

1. Open Settings → Applications → Application Management.
2. Slip on the three points in the upper right corner and select Show System Processes.
3. Find Bluetooth (or Bluetooth Share in the newer versions).
4. Choose Battery Optimization → No restrictions.
5. Go back and press Permissions → Autostart (enable if disabled).

Energy saving mode

The Ultra-Economic or Energy Saving mode on can completely block Bluetooth pairing.

• 🔋 Settings → Battery. → Energy saving mode (must be switched off or balanced).
• ⚡ If Adaptive Charging is used, temporarily turn it off – it sometimes resets Bluetooth settings.

Reset Bluetooth settings (without data loss)

If the previous steps didn’t help, reset your Bluetooth settings without resetting your phone to factory:

1. Go to Settings → Connections and Sharing → Bluetooth.
2. Slip on the three points in the upper right corner → Clear the cache.
3. Return to the main Bluetooth menu and select Reset Settings (in some firmwares this item is hidden – see spoiler below).

Important: once reset, all the connected devices will be removed, and the column will have to be reconnected, like the first time.

Bluetooth profile conflicts: why the sound is not on the speaker

If the phone "sees" the speaker and even connects, but the sound continues to go through the speaker of the smartphone - the problem is in the conflict of Bluetooth profiles. The column can support multiple profiles at once (for example, A2DP for music and HFP for calls), but MIUI sometimes chooses the wrong one.

How to fix it:

1. Connect the speaker to the phone.
2. Open Settings → Sound → Additional settings.
3. Select Output → Bluetooth device and make sure your speaker is selected.
4. If the speaker is not listed, tap the gear icon next to its name in the Bluetooth menu and turn on the Use for Media option.

⚠️ Note: If the column supports LE Audio (e.g. Xiaomi FlipBuds Pro or Soundcore Space) Q45), But your phone is older than 2021, upgrade to the latest version of the firmware, otherwise the sound will be interrupted or absent.

4.Firmware problems and engineering menu

If your Xiaomi runs on custom firmware (e.g. LineageOS, Pixel Experience) or has not been updated for a long time, the problem may lie in the core of the Bluetooth stack, especially for models with a Qualcomm Snapdragon 6xx/7xx chip (e.g., Redmi Note 10 Pro, POCO X3 NFC).

How to check:

1. Find out the firmware version: Settings → About the phone → MIUI version.
2. Compare the latest stable versions on Xiaomi’s official website.
3. If the version is outdated, update via Settings → System Update.

If the update didn’t work, try resetting your Bluetooth settings via the engineering menu:

##2846579## → ProjectMenu → Bluetooth → BT Test Mode → Reset BT

After reset, restart the phone.

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If the engineering menu doesn't open, try the code ##4636## → Phone Information → Bluetooth battery usage → reset the stats.

5. Hardware malfunctions: how to diagnose

If no Bluetooth device connects to your phone (including headphones, fitness bracelets, car systems), the problem may be:

• 🔌 Faulty Bluetooth module (often after falls or moisture infestation).
• 🔋 Problems with the antenna (especially in models with a removable back cover, for example, Redmi) 9A).
• 🔄 Conflict with SIM-Card (rarely, but happens on two-symbol Xiaomi).

How to check:

1. Connect your phone to another device (e.g., headphones) and if it doesn't work, the phone is a problem.
2. Try connecting the speaker to another phone. If it works, it's a problem with your Xiaomi.
3. Run the hardware component test: ##6484## Select Manual Test → Bluetooth Test. If the test fails, the hardware malfunction.

⚠️ Warning: If the phone falls or gets wet, don’t try to disassemble it yourself – Xiaomi often uses adhesive joints and you risk damaging the plumes. U.FL-Bluetooth module connector (the cost of diagnosis is from 500 rubles).

6. Features of old Xiaomi models (until 2020)

Owners of Redmi Note 8/9, Mi A2/A3, POCO F1 and other Bluetooth 4.2/5.0 models often face compatibility issues due to the outdated protocol stack.

• 🔄 Firmware rollback: In some cases, update to MIUI 12.5+ It breaks Bluetooth. Try to roll back on the top. MIUI 11 (instructions are available on the forum) 4PDA).
• 📱 Adapter usage: If the speaker supports Bluetooth 5.1+, Buy a low-cost Bluetooth transmitter (e.g. Baseus) B07) and connect it to the phone through USB-C/3.5 mm.
• 🔧 Manual Codec Customization: In Developer Settings (how to enable – see below) select Bluetooth Audio Codec and try it out SBC instead AAC or.

How to turn on the developer settings:

1. Go to Settings. → The phone.
2. Tap 7 times on the MIUI version.
3. Return to the main settings menu – a new item for developers will appear.

💡

On older Xiaomi (until 2019), it often helps to disable the dual app feature (Settings → Apps → Dual apps).

7. Alternative ways of connecting

If Bluetooth doesn’t work hard, consider alternatives:

• 🎵 Aux cable (3.5 mm: Most of Xiaomi's columns, JBL, Marshalls have a wired connector. 3.5 mm (e.g. Xiaomi) 12/13) You'll need an adapter. USB-C → 3.5 mm.
• 📶 Wi-Fi Direct: Some speakers (e.g. Xiaomi Mi Smart Speaker) support Wi-Fi connectivity. Enable Wi-Fi Direct in the speaker settings and connect to its network as a router.
• 🔌 USB-OTG: Supported columns USB Audio (such as Soundcore Motion Boom) can be connected directly via cable USB-C/USB-A.

To connect via USB-OTG:

1. Enable USB debugging in the developer settings.
2. Connect the column with a cable to the phone.
3. In the notification curtain, select USB file transfer → USB-audio.

FAQ: Frequent questions