Bluetooth on Xiaomi and headphones: how to eliminate cliffs, delays and noise in 5 steps

You listen to music through Xiaomi AirDots or Redmi Buds, but the sound is constantly interrupted and the connection is lost and then reappears? The problem is familiar to most owners of Xiaomi smartphones - even flagship models like Xiaomi 14 or POCO F6 sometimes suffer from unstable Bluetooth connection, the reason not only hardware limitations, but also software features of the MIUI firmware, which can be fixed without contacting the service.

In this article, we’ll look at 7 proven ways to improve communication between Xiaomi phone and wireless headphones, from basic settings to hidden engineering menu features. You’ll learn why Xiaomi headphones most often lose connection at 2.4 GHz, how to properly reset the Bluetooth cache, and which audio codecs should be turned off for stable operation. All methods have been tested on 2020-2026 models and are compatible with MIUI 12-14.

1. Check the compatibility of headphones and smartphones

Before digging into the settings, make sure your headphones and Xiaomi phone are designed to work with each other at all.For example, Xiaomi AirDots Pro 2 is optimized for MIUI 11+, and the old Redmi AirDots (2019) can conflict with new smartphones due to the outdated Bluetooth 4.2 protocol.

Here are the key points of compatibility:

• 📱 Bluetooth 5.0+ (smartphone) + Bluetooth 5.0+ (Headphones, minimum standard for stable communication, check the model specifications.
• 🎧 Xiaomi headphones with support LC3 or AAC Codecs work better with phones on MIUI 13/14.
• ⚠️ Headphones from third-party brands (such as Sony) WH-1000XM5) You may need to manually select a codec in the developer settings.

To find out the Bluetooth version on your phone:

1. Open Settings → About the phone → All the characteristics.
2. Find the Bluetooth string and the version will be specified (e.g. 5.3).

⚠️ Note: If your smartphone supports Bluetooth 5.2+, But headphones are only 4.2, and communication breaks will be frequent. Solution: Update the firmware of the headphones (if available) or use them in low latency mode (Game Mode).

2. reset Bluetooth settings and clear cache

The most common cause of unstable connections is a clogged Bluetooth cache or conflicting device profiles, and in MIUI, the cache accumulates after each connection, and over time this leads to failures. Here's how to clean it:

Remove headphones from the list of associated devices|Turn off Bluetooth in the notification panel|Clear the cache of the "Bluetooth" application"|Reboot the phone.|Put your headphones back together.-->

Details of the procedure:

1. Device Removal: Go to Settings → - Bluetooth, hit the icon. ⚙️ Next to the headphone name. Select Forget the device (or Delete it).

Cache cleanup:

• Open Settings → Applications → Application Management.
• Find Bluetooth (system application).
• Select Warehouse. → Clear the cache.

After you restart your phone, try reconnecting your headphones. If the problem persists, move on to the next step.

💡

After resetting Bluetooth, try connecting your headphones in flight mode (with Bluetooth enabled) to eliminate interference from the mobile network and Wi-Fi, which often interfere with the frequency of 2.4 GHz.

3. Sound codec optimization (AAC, SBC, aptX)

MIUI defaults to SBC codec, which is versatile, but it's not always stable. If your headphones support AAC or aptX, forcing them to switch to it can solve the problem of cliffs. Here's how to do it:

First, check which codec your headphones support (usually listed on the manufacturer's website).

1. Activate Developer Mode: Go to Settings → About Phone. Tap 7 times on the MIUI Version line. Enter the lock screen password if necessary.

• Open the settings → Additional → for developers.
• Find the Bluetooth Codec (or Bluetooth Audio Codec).
• Select AAC (for AirPods or Sony) or aptX (for JBL or Bose).

⚠️ Note: Do not change the parameters BT channel BT Frequency Hopping – This can cause Bluetooth to be completely inoperable before resetting settings!

After applying the changes, restart your phone. If the connection gets worse, return the values to the standard (usually Class 2 and default timeouts).

💡

The engineering menu is a powerful tool, but dangerous. Change only the parameters specified in the instructions, and always fix the initial values (you can take a picture of the screen).

5. Elimination of interference from Wi-Fi and other devices

Bluetooth and Wi-Fi are on the same frequency (2.4 GHz), so a router, microwave or even a wireless mouse can cause interference. If cliffs happen at home, try:

• 📶 Switch Wi-Fi to 5GHz: Open your router settings (usually at 192.168.1.1).Look for the Wireless partition and activate the 5GHz network.
• 🔄 Change Wi-Fi Channel: In router settings, select channel 1, 6, or 11 – they least overlap with Bluetooth.
• 🚫 Disable unnecessary devices: Wireless speakers, fitness bracelets or Xiaomi smart bulbs can conflict with headphones.

Also check if the phone is power-saving mode is on — it limits Bluetooth power. Turn it off in Settings → Battery → Power-saving mode.

6. Update the firmware of headphones and phone

Manufacturers regularly release updates to fix Bluetooth bugs. For example, MIUI 14.0.5 was fixed bug with communication breaks on Xiaomi 13 Pro, and Redmi Buds 4 Pro released an update that improves compatibility with AAC.

How to update the firmware headphones Xiaomi:

1. Install the official app: For AirDots/Redmi Buds: Mi Earphones (download Google Play or AppGallery). For FlipBuds or Buds 4: Xiaomi Earphones.

Connect the headphones to the phone and open the application.

If an update is available, follow the instructions on the screen (it is usually required to keep the headphones in a case with the lid open).

MIUI Update:

1. Go to Settings → About the phone → System update.
2. If a new version is available, download and install it.
3. After the update, reset your Bluetooth settings (see Section 2).

⚠️ Warning: Before you change your antenna or repair it, check if it's caused by a software failure. Test your headphones with a different phone (not Xiaomi) if they're stable, your smartphone is the problem.

FAQ: Frequent questions about Bluetooth on Xiaomi