Why Xiaomi Headphones Connect One at a Time: 7 Reasons and How to Fix It

Did you take Xiaomi's new wireless headphones out of the box, turn them on, but instead of synchronizing, both headphones connect separately? Or is one of them not defined by a smartphone at all? This problem is familiar to many owners. TWS-Headphones from Xiaomi - from budget Redmi Buds to flagship Xiaomi FlipBuds Pro. In most cases, faulty devices are not to blame, but the features of the connection protocol, user errors or software failures.

In this article, we’ll discuss 7 main reasons why Xiaomi headphones connect one at a time, and give you step-by-step troubleshooting instructions, how to properly reset your headphone settings, update your firmware, check compatibility with your device, and even restore one dead earphone, and at the end, answer frequent questions and a compatibility table of popular models.

1.Why Xiaomi headphones connect separately: the main reasons

The first thing to understand is that connecting headphones one by one is not always a mistake. Some models (such as the Xiaomi AirDots Pro 2) initially support Mono mode, where you can only use one earphone for calls. However, if both headphones are supposed to work in stereo, but connect separately, the problem lies in one of the following factors:

• 🔋 A discharged battery in one of the headphones (even if the indicator is on, the charge can be critically low).
• 📱 Bluetooth version of the smartphone and headphones incompatible (for example, Redmi Buds 3 Lite require Bluetooth 5.0)+).
• 🔄 Synchronization failure between headphones (often after a firmware update or reset).
• 🛠️ Hardware malfunction of one of the headphones (damage to contacts or chips).
• 📲 Conflict with other Bluetooth devices (for example, if the headphones were previously paired with another gadget).
• 🔧 Incorrect sound settings in the smartphone (Monosound or Hearing Aid mode).
• 🖥️ Software errors in the firmware of headphones or smartphone OS (especially relevant for MIUI 12/13).

Important: if the headphones are connected one at a time after purchase, there is a 90% chance that the problem is incorrect pairing sequence or conflict with other devices in the headphone memory, in which case the reset to factory settings (instruction below) will help.

2. How to connect Xiaomi headphones in stereo mode

Many users make the mistake of first connecting, and if you just turn on your headphones and try to connect them through your smartphone's Bluetooth menu, there's a big risk that they'll be defined as two separate devices.

1. Turn off Bluetooth on your smartphone.
2. Remove both headphones from the case – they should automatically turn on and synchronize with each other (indicators will flash alternately).
3. Press the button on the case (if any) or touch panel on one of the headphones for 3-5 seconds, until the indicators start flashing quickly white (mating mode).
4. Turn on Bluetooth on your smartphone and select the name of your headphones (e.g., “Redmi Buds 3 Pro”) from your device list.
5. Confirm the connection – after that, both headphones should be defined as one device.

If the headphones still connect one at a time, try forced synchronization:

1. Put both headphones in the case and close the lid for 10 seconds.
2. Pull them out and wait until the indicators start flashing red and white (meaning they’re trying to sync).
3. If synchronization does not occur, reset the settings (see the next section).

Both earphones are charged (indicators are lit green)

Bluetooth on your smartphone is turned off before the procedure begins

The headphones are not paired with other devices

The original case is used (not third-party)

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3. Resetting headphones Xiaomi: step-by-step instructions

If the headphones have previously connected to other devices or there has been a software failure, hard reset will help.

Once reset, the headphones will automatically clear the memory of the paired devices, and now they need to be reconnected, as described in the previous section, if the reset did not help, the problem may lie in the firmware or hardware malfunction.

⚠️ Note: Some models (e.g. Xiaomi Air 2) SE) They require a reset via the Mi Home or Xiaomi Wear mobile app, and without it, a hard reset may not work.

4.Firmware problems and how to solve them

One of the most insidious bugs is the incompatibility of the firmware versions between the left and right headphones, which happens when one device is updated and the other one is not.

• 🔴 One earphone is connected, the second is not.
• 🔊 The sound is only in one headphone, even if both are connected.
• 🔄 Headphones are constantly disconnected during playback.

The solution is to force firmware updates.

1. Install the official app: For Redmi Buds – Xiaomi Wear (Android) or Xiaomi Wear Lite (iOS). For FlipBuds Pro – Mi Home.

Connect the headphones to the app (they should be defined as one device).

Firmware

Update of the PO

Update

If there is no update button in the app, try:

• 📱 Reinstall the application.
• 🔄 Reboot your smartphone.
• 🌍 Change region in the app settings to China (sometimes updates appear earlier).

5. Hardware malfunctions: how to diagnose

If the software methods didn't work, the problem could be a physical breakdown.

• 🔌 Charging contacts in the case or on headphones (oxidation, pollution).
• 🎛️ Bluetooth chip (more often fails in cheap models).
• 🔋 Battery (blown or loss of capacity).
• 📡 Antenna (damage after falling).

How to check:

1. Look at the contacts on your headphones and in your case, they should be clean, without green coating (oxidation). Clean them with a cotton swab with alcohol.
2. Check the charge: Put the headphones in the case for 30 minutes. Take them out -- if one earphone discharges faster, the battery is the problem.

Test with another device

⚠️ Warning: If the headphones have fallen into the water or been severely impacted, do not try to disassemble them yourself - this can lead to a short circuit.

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If one headphone does not turn on at all, try to put it in a case for a day - sometimes it helps to "reanimate" a discharged battery.

6 Device Compatibility: Why Android and iPhone Behave Differently

Xiaomi headphones are optimized for MIUI devices, but they also need to support other platforms.

If you use a laptop or PC, check if your Bluetooth adapter supports an A2DP profile (required for stereo sound). On Windows, this can be done through Device Manager → Bluetooth.

7. Alternative solutions: if nothing helps

If all of the above methods fail, try these non-standard methods:

• 🔄 Flashing through Engineering Mode (power users only!): Instructions for Engineering Mode 1. Install the app MTK Engineering Mode (available on the 4PDA). 2. Go to Hardware Testing → Bluetooth. 3. Select Reset Bluetooth Stack and restart the device. ⚠️ Risk of losing Bluetooth connection data!
• 📦 Case replacement – if contacts in the case are damaged, the headphones cannot synchronize.
• 🔧 Repair in the service center – if the warranty is still valid, contact the official Xiaomi service.
• 🛒 Buying a new headphone – some models (for example, Redmi Buds 3) allow you to buy a left or right headphone separately.

If you’re considering buying a replacement, look for models that support Bluetooth 5.2+ and TrueWireless Mirroring technology (such as Xiaomi Buds 4 Pro).

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Before buying a new headphone, check if your smartphone supports Bluetooth 5.0+. To do this, go to Settings → About Phone → Bluetooth version.

FAQ: Frequent questions about connecting Xiaomi headphones