How to talk through wireless headphones on Xiaomi: setting up and solving problems

Using a wireless headset makes communication comfortable, freeing hands and providing mobility. However, owners of Xiaomi, Redmi and Poco smartphones sometimes face situations when the device is paired, but the interlocutor does not hear you or the sound is transmitted incorrectly. Modern shells MIUI and HyperOS have advanced audio management functions that require the correct configuration for stable operation.

The problems can be in the banal lack of permission for the application, and in the specific settings of Bluetooth codecs. In this article, we will discuss the full algorithm of actions: from initial pairing to fine debugging system parameters through an engineering menu, you will learn to switch audio channels on the fly and eliminate delays that interfere with a full dialogue.

To get started, make sure your headphones are fully charged and in pairing mode. Xiaomi smartphones are famous for aggressive battery optimization that can sometimes interrupt background voice processes. Properly configuring your Bluetooth HSP/HFP profile is key to delivering voice, not just music.

Initial pairing and profile verification

The foundation of good communication is the correct initial connection of the device. You don't have to rely on automatic detection, especially if you use third-party headphones. Go to Settings → Bluetooth and click the search button for new devices. At this point, it is important to keep the headset as close to the phone as possible to avoid losing data packets when exchanging encryption keys.

Once the device name appears on the list, click on it to pair. The system can request code confirmation or simply notify you of a successful connection. It is critical to check which profiles are activated for a given headset. To do this, click on the gear icon or arrow next to the name of the connected device in the Bluetooth menu.

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If after connecting the headphone icon in the status bar did not appear, try to restart the smartphone without breaking the connection with the headset.

In the menu that opens, make sure the Sound and Call switches are activated. Not checking the box for Challenge is the most common reason why music is playing and you can't hear the other person. Some budget headphones may not support simultaneous stereo and high-quality voice transmission by switching to mono mode.

• 🎧 Make sure the indicator on the headphones flashes blue (search mode).
• 📱 In the list of available networks, select a device marked “Headset” or “Hands-free».
• ✅ Check the profile activation HFP (Hands-Free Profile in Connection Details.

Set up sound routing in MIUI and HyperOS

Xiaomi shells give users flexible control over the sound sources. When you call in or out, you have a special audio switch button on your lock screen or the call interface. It usually looks like a speaker icon or a Bluetooth headset. If the default sound is coming through your phone's speaker, click on this icon and select your wireless headset.

Newer versions of HyperOS have introduced Smart Switching, which allows you to automatically transmit sound to your headphones when you put them on (if you have proximity sensors), or when you start a conversation, and this option is located in the Settings menu → Sound and Vibration → Headphones and sound effects, which makes life much easier by eliminating the need for manual manipulations every time you call.

⚠️ Warning: Auto-switching may not work properly with cheap Chinese AirPods because they use custom ear detection protocols.

Also worth looking at is the Security app built into the system. In the Permissions section, find your call app (standard Caller or Google Phone, WhatsApp, Telegram) Make sure they have access to a microphone and Bluetooth devices, without which system restrictions can block voice transmission to an external headset.

Working with microphone and noise reduction

The quality of your voice depends not only on the headphones, but also on the algorithms of the signal processing in the smartphone. Xiaomi uses noise reduction technologies that can work too aggressively, “eating” part of the frequencies of your voice, especially in quiet rooms. If the interlocutor complains that you are talking “under water”, try changing the settings of the microphone.

Some models, like the Xiaomi 13 or Xiaomi 14, have sound effects settings available for calls. Go to Settings → Sound and Vibration → Sound Effects. You can try turning off Voice Improvement or changing the equalizer. Sometimes resetting the sound settings to factory settings helps if you've previously experimented with audiophiles.

The physical location of the microphones deserves special attention. The main microphone for talking through the headset is often located at the bottom of the smartphone, rather than in the headphones themselves (in hands-free mode). However, when using a Bluetooth headset, the sound should be written from it. If the system makes a mistake and uses the microphone of the phone, check if it is covered with a cover or a finger.

• 🎙️ Check the microphone hole for cleanliness from dust and pile.
• 🔇 Disable third-party applications to record calls, they can intercept the audio stream.
• 📶 Make sure the distance between the phone and the headphones does not exceed 5-7 square-yard.

Solving problems with delay and interruption of sound

Latency is a scourge of wireless technology, and in conversation, it manifests itself as a lip-voice-dissynchronization or pause before the speaker speaks, the main reason is the codec used. SBC is a basic codec with high compatibility but low speed. aptX and LDAC provide better quality, but require support from both sides.

To check and change the codec, you need to activate the developer menu. Go to Settings → About phone and quickly click on MIUI Version or OS Version 7 times. Then the optional menu will appear “Developers” option. Find the Audio or Bluetooth section and select Bluetooth Codec. Try changing it to SBC if you have problems, or to aptX if you need quality.

The path to hidden settings:


Settings → About the phone → (7 clicks according to version) → Advanced settings → For developers → Bluetooth codec

Another cause of interruptions may be signal interference. 2.4GHz Wi-Fi routers, microwave ovens, and other Bluetooth devices cause interference. If you're in an area with a lot of wireless networks, try switching Wi-Fi to 5GHz in the router settings to free up the air for Bluetooth.

Comparison of codecs for voice communication

Choosing the right codec affects not only music, but also speech intelligibility. Below is a table to help you understand which protocol is best suited for your use cases with Xiaomi devices.

For regular phone calls, SBC codec is enough, because the bandwidth of the telephone network still limits quality, but for video calls in Zoom, Skype or Discord, switching to aptX can significantly improve the synchronization of video and audio.

⚠️ Attention: Forced inclusion of the codec LDAC If you have an unstable connection, you can completely disappear the sound. If you change the settings, you can return the value of "System standard».

Diagnostics through engineering menu and reset

If the software settings don't work, you should go to deep diagnostics. Xiaomi phones have an engineering menu that allows you to test the hardware part of Bluetooth. Enter the code ##6484## in the Calls app. Select BT or Bluetooth Test. Here you can check the antenna and the presence of data transmission errors.

A radical but often effective method is to completely reset your network settings. This won't delete your photos or contacts, but will clear all your stored Wi-Fi passwords and Bluetooth. Go to Settings → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth → Reset. After the reboot, reset your pair with your headphones.

It’s also important to check your smartphone’s firmware version. Xiaomi regularly releases updates that fix Bluetooth stack bugs. Go to Settings → About Phone → MIUI version and check for updates. Sometimes the problem is massive and only solved by releasing a patch from developers.

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90% of voice problems are solved by reconnecting the device or resetting the network settings, rather than requiring hardware repair.

Frequently Asked Questions (FAQ)