Why Xiaomi phone does not see headphones: all the reasons and ways to eliminate

You've connected your headphones to Xiaomi, but your phone keeps obsessing about them? An annoying moment, especially when you need to answer your phone or listen to music. The problem is found on all models, from the budget Redmi Note 12 to the flagship Xiaomi 14 Ultra, and it's equally common with wired and Bluetooth headphones. 80 percent of the time, software problems are to blame, but sometimes the root of the evil lies in the hardware.

In this article, we’ll look at all the possible reasons Xiaomi doesn’t see headphones, from the banal contamination of the connector to the hidden developer settings. You’ll learn how to diagnose a problem in 2 minutes, what manipulations will bring the sound back, and when it’s time to carry the phone to the service. And also a unique life hack for POCO F5 owners with the “Audio Device Not Found” error after the MIUI 14.5 update.

1. Checking the basics: what to do first

Before digging deep into the settings, rule out the obvious reasons. Often users spend hours looking for a solution when a problem is solved in 30 seconds.

Start with a physical examination:

• 🔌 Wired headphones: check the integrity of the cable (especially the 3.5 mm plug), try connecting them to another device.
• 📶 Bluetooth headphones: make sure they are charged (the indicator should flash or burn green) and the phone is Bluetooth enabled (Settings) → Connections → Bluetooth).
• 🔍 3.5mm connector (if any): light a flashlight - there should be no dust, debris or bent contacts inside. Use a toothpick (carefully!) or compressed air to clean.

If everything is in order with the “iron”, proceed to the software diagnosis:

1. Restart the phone (press Power + Volume up for 10 seconds).
2. Try connecting other headphones – if they work, the problem is the former.
3. Turn off all additional audio devices (columns, smartwatches) – sometimes MIUI gets confused about priorities.

⚠️ Note: If the phone does not respond to the connection of any headphones (including the original from Xiaomi), this may indicate damage to the audio chip.

2.Muzzle settings in MIUI: what could have gone wrong

MIUI is known for its abundance of hidden features that sometimes conflict with standard scenarios, such as after upgrading to MIUI 14, many POCO X5 Pro users encountered a bug when the phone “saw” the headphones, but the sound was going through the speaker, due to the lost audio routing settings.

Check the following parameters:

Pay special attention to Settings → Special Features → Audio. There are options like Monoaudio or Sound Amplification that can interfere with the normal operation of the headphones. If you recently activated these features, turn them off.

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Xiaomi’s Android 13+ phones have a hidden audio test menu. To open it, type in the Phone app code ##36446337## (not available on all models).

3. Reset Bluetooth settings and audio system

If the headphones are wireless and the phone doesn't see them or connects with errors, the first thing you do is reset your Bluetooth settings, which removes all the stored devices and returns the module to factory settings.

Instructions:

1. Open Settings → Connections → Bluetooth.
2. Click on the three dots in the upper right corner → “Debugging”.
3. Select “Reset Bluetooth Settings” and confirm.
4. Reboot the phone.

For wired headphones, or if the problem affects all audio devices, reset the sound system settings:

Remove all Bluetooth devices | Disable “Adaptive Sound” in the sound settings |Reset the Music app settings |Reboot the phone-->

If your headphones still don't work after reset, try updating your firmware. MIUI often comes out with patches that fix audio bugs. To check for updates, go to Settings → About Phone → System Update.

⚠️ Note: on some models (Redmi) 10C, POCO M4 Pro) after resetting Bluetooth, the option of Dual Audio (simultaneous connection of two devices) may disappear. To return it, you will have to manually turn on the developer mode and activate the function through Settings. → For developers → Enable Dual Audio.

4.Problems with 3.5mm connector and USB-C

If your Xiaomi is equipped with a 3.5 mm connector (for example, Redmi Note 11 or POCO M5), the problem may lie in mechanical damage to the contacts.

• 🔧 Contorted plug: If you often carry your phone in your pocket with your keys, the contacts inside the connector may have warped.
• 💦 Oxidation: ingress of moisture leads to corrosion, which is why the phone does not recognize the connection.
• 🧹 Clogging: Dust and pile block contact between plug and connector.

For diagnosis:

1. Put your headphones on and move the plug a little bit, and if the sound comes or goes, the contact problem is.
2. Put a flashlight on the connector, and if you see green plaque, it's oxidation. Use alcohol and cotton swab to clean it.
3. Try connecting the headphones via a USB-C adapter (if any), and if they work, it's the 3.5mm connector.

On phones without 3.5mm (such as the Xiaomi 13T or POCO F5), the sound is transmitted via USB-C.

• 🔌 Unoriginal adapter: cheap adapters may not support audio transmission.
• 🔋 Charging mode: If the phone detects the connected device as charging, the sound will go through the speaker. USB Audio Class 2.0.

5. Conflicts with applications and services

Sometimes the headphones don't work because of background apps that block the audio stream.

• 🎵 Music players (Spotify, YouTube Music) can “hang” in playback mode via the speaker.
• 🎮 Game utilities (e.g. Game Turbo in the MIUI) snoop.
• 🛡️ Clean Master, 360 Security (antiviruses or optimizers) block access to audio drivers.

How to fix it:

1. Close all applications through Recent → Close all.
2. Turn off Game Turbo in Settings → Special Opportunities → Game Space.
3. Check permissions for applications in Settings → Applications → Permissions Management → Microphone (sometimes audio access rights conflict).
4. Run your phone in safe mode (press Power → Click Power Off → Confirm). If the headphones are running, it's third-party software.

A special case is Google Assistant, which, after upgrading to MIUI 14, many users noticed that the voice assistant was stealing the audio stream.

Settings → Google → Devices and Sharing → Voice Match → Disable “Voice Unlock”

6. Hardware malfunctions: when without service can not do

If all the software methods have been tried and the headphones still don't work, the problem is probably hardware.

The most vulnerable models according to the statistics of service centers:

• Redmi Note 10 Pro – frequent problems with the audio chip after falls.
• POCO X3 Pro - oxidation of the connector 3.5 mm due to poor sealing.
• Xiaomi 12 Lite – the dump of the Bluetooth antenna when overheating.

Before you carry your phone to the service, check whether it is not covered by the warranty. In official centers Xiaomi repair audio chip warranty is free, as long as the breakdown is not caused by mechanical damage (for example, water).

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If the phone falls into the water or is hit hard, 90 percent of the time it's hardware, and if you don't have experience repairing yourself, you can make it worse, trust the professionals.

7 Hidden MIUI features: how to enable audio debugging

MIUI has hidden settings that can help diagnose a problem, such as audio debugging mode, which lets you see if the system recognizes the kernel-level connection of the headphones.

To activate it:

1. Enable Developer Mode: Settings → About Phone → MIUI Version (click 7 times)
2. Back to Settings → Additionally. → For developers.
3. Find the “Audio Debugging” option and turn it on.
4. Connect headphones and check the log in Settings → For developers → Audio logs.

If the Headset plugged in: false message appears in the logs, the headphones are connected, it confirms a hardware malfunction. If the message is true but there is no sound, the problem is the software routing.

Another useful option is “Disable Bluetooth Absolute Volume” (in the same settings for developers), which helps when the headphones are connected, but the sound is too quiet or distorted.

FAQ: Frequent questions about headphone problems on Xiaomi