Why Xiaomi Redmi Headphones Don't Connect to Each Other: A Complete Diagnostics and Repair Guide

The problem with synchronizing Xiaomi Redmi wireless headphones is one of the most common complaints of users: you take the headphones out of the case, turn them on, but instead of the usual stereo sound, you hear only one channel, either both earphones are silent, or they are not identified by the phone as a pair at all, and this is aggravated by the fact that the manufacturer rarely gives clear instructions for fixing this malfunction, and in service centers they charge money for diagnosis.

In this article, we will analyze all possible reasons why headphones Redmi AirDots, Redmi Buds or other models from Xiaomi stop connecting to each other – from banal (discharged case) to technical (damage Bluetooth module). You will receive step-by-step instructions with illustrations, compatibility tables and answers to frequent questions. 3/4 Lite and AirDots 3 Pros who are most often affected by this problem.

If you've tried to reboot your headphones or reset them to factory settings, but nothing has worked, don't rush to throw the device away. 80 percent of the time, the problem is solved software-based, without repair, and the main thing is to correctly diagnose the source of the problem.

1.The main reasons why Redmi headphones don't sync

Xiaomi's wireless headphones are lead-led, where one headphone (usually the right one) connects to the phone, and the other one syncs to the first one. If this process is disrupted, you either hear the sound in only one headphone, or both are silent.-7 cause of such malfunction:

• 🔋 Battery discharge: Case or one of the headphones is not fully charged. Even at 10% charge, the headphones can turn on but not sync.
• 📱 Bluetooth conflict on the phone – a failure in the connection protocol (especially relevant for Android) 12+ and MIUI 13/14).
• 🔄 Failure of the firmware of headphones - after updating or a sharp power outage.
• 🎧 Mechanical damage to contacts – oxidation or contamination of connectors in a case or on headphones.
• 🔗 Mating disorder – Headphones “forgot” each other after resetting or connecting to another device.
• 📦 Model incompatibility – trying to pair headphones from different sets (for example, the left from Redmi Buds 3 with the right from AirDots 2).
• 🛠️ Hardware breakdown - failure of the Bluetooth module in one of the headphones.

The most insidious reason is a software mating failure, for example, if you plug your headphones into your laptop and then go back to your smartphone, they can forget their pair, and in this case, only a complete reset helps.

A critical feature of the Redmi Buds 4 Lite and AirDots 3 Pro models is that they use Bluetooth 5.2 protocol with LE Audio function, which can conflict with older versions of Android (below 10). If your phone is on Android 9 or older, the sync problem is almost guaranteed.

2. Diagnosis of the problem: how to understand what is the problem

Before you rush to reset, you need to figure out what's wrong. Here's a proven diagnostic algorithm.

1. Check the headphone indicators: 🟢 Green flashes - headphone in search mode. 🔴 Red flashing – low charge or error. 🔵 Blue is constantly burning – connecting to the device. 🟣 Purple flashes - reset settings.
2. Listen to the beeps: 🔊 One long signal - the earphone turned on. 🔊 Two short – a successful connection to the phone. 🔊 Three signals in a row - synchronization error.
3. Check the case: 🔋 The indicator on the case burns white - the charge is. 🔋 Flashes red - the case is discharged (even if the headphones show charge).

If one earpiece flashes green and the other flashes red, it means they can't see each other, and if both blink purple, it's a reset, you can't interrupt it.

3. Step-by-step instruction: how to get the headphones to connect to each other

If the diagnosis shows that the problem is software (earphones do not "see" each other, but the charge is), follow this instruction. It is suitable for all models of Redmi AirDots and Redmi Buds, except for Redmi Buds 5 Pro (for them there is a separate section below).

Step 1: Completely reset your headphones

1. Put both headphones in the case and close the lid.
2. Press and hold the button on the case (if any) for 15 seconds until the indicator starts flashing purple.
3. For models without a button on the case: press the touch panels on both headphones for 10 seconds.
4. Wait for a double beep, which means the reset was successful.

Step 2. Re-mating

1. Get the headphones out of the case - they should turn on automatically.
2. Press the touchpad on the right earphone for 3 seconds until you hear the "Ready to pair" voice message (or see a flashing white/blue indicator).
3. On the phone, go to Settings. → Bluetooth and select Redmi ____ R (right earphone).
4. After connecting the right left should automatically sync (you will hear the second beep).

Step 3: Check on another device

If the headphones aren’t synced to your phone, try connecting them to another smartphone or laptop. If they’re working normally on another device, your phone’s Bluetooth is a problem (see section 5 for more).

4. Features of Redmi Buds 5 Pro and AirDots 3 Pro models

Redmi Buds 5 Pro and AirDots 3 Pro headphones use enhanced Bluetooth 5.3 protocol with support LC3-It gives you better sound quality, but it creates compatibility problems with older devices:

• 📱 Minimum Requirements: Android 11+ or iOS 15+. On older versions, headphones will connect, but with communication breaks.
• 🔗 Automatic reconnect: These models remember the last device and try to connect to it automatically. If the headphones curl on another phone, they can ignore your main smartphone.
• 🎵 Low Latency Mode: If Game Mode is enabled, the headphones may refuse to sync when charged low (less than 30%).

How to Reset Redmi Buds 5 Pro:

1. Put the headphones in the case.
2. Open the lid and hold both touch panels for 20 seconds.
3. The indicator on the case should flash red → blue → white.
4. After reset, connect the headphones again through the Mi Earphones app (required!).

⚠️ Note: Redmi Buds 5 Pro headphones will not work properly without the official Mi Earphones app. If you have removed it, download again from Google Play or AppGallery.

5. Bluetooth issues on Xiaomi phone

If the headphones are synchronized with each other, but do not connect to the phone, the problem is in the Bluetooth module of your Xiaomi.

• 📱 Phone "sees" headphones, but when connected gives an error.
• 🔄 The connection is constantly being broken through 5-10 seconds.
• 🎵 The sound is interrupted, although the headphones show a stable connection.

How to fix it:

1. Clear the Bluetooth cache: Go to Settings → Annexes → Application management → Three points (⋮) → Show system-based → Bluetooth. Press Clear cache and erase data.
2. Reset network settings: In Settings → SIM-maps and mobile networks → Network resets, which will delete all stored Wi-Fi and Bluetooth devices, but often solves the problem.
3. Turn off battery saving for Bluetooth: Go to Settings → Battery and Performance → Apps selection → Bluetooth and install Without Limits.
4. Update the firmware: In Settings → About the phone → System Update. For Redmi Note 10/11 models, it is critical to upgrade to MIUI 13.0.5+, otherwise there will be problems with Bluetooth 5.2.

⚠️ Note: If after resetting the network settings headphones ceased to be defined at all - remove them from the list of devices in Settings → Bluetooth, then perform re-pairing.

Compatibility table for Redmi headphones with Xiaomi phones:

Mechanical malfunctions: when without repairs can not do

If all the software methods have been tried, but the headphones still don't sync, the problem could be hardware.

• 🔌 Oxidized contacts in the case or on headphones (visible to the naked eye).
• 🔊 There is no sound in one earphone even after resetting.
• 🔋 The headphone is not charged (the indicator does not burn when placed in the case).
• 📡 Constant noise disturbance in the sound, even if the headphones are synchronized.

What you can do on your own:

1. Contact cleaning: Take a cotton swab, moisten it in alcohol solution (at least 70%) and gently wipe the contacts on headphones and in the case. Do not use abrasive materials!
2. Charging check: Connect the case to the charger and see if the indicator is on. If not, try another cable and power supply. Redmi cases often become unusable due to cheap cables.
3. Test on another case: If you have someone familiar with the same headphone model, try putting your headphone in his case. If it charges and starts working, your case is defective.

⚠️ Warning: If the headphone doesn't turn on at all (no indication, no sound signals), don't try to disassemble it - it will lead to loss of warranty. In 90% of cases, such a failure requires a replacement battery or board.

7. Frequent User Errors and How to Avoid Them

Many synchronization problems are caused by incorrect user actions.-5 Mistakes and how to avoid them:

• 🔄 Resetting just one headphone → Always drop both earphones at the same time, otherwise they will forget each other.
• 📱 Connecting to multiple devices → Redmi headphones don't work well in multipoint mode (to your phone and laptop at the same time.
• 🔋 Use of non-original cable → Cheap cables can undercharge the case, leading to synchronization failures.
• 🎧 Storage of headphones outside the case → If you leave your headphones on the table, they will discharge to 0%, and they will have to be reset.
• 🔊 Ignoring firmware updates → Mi Earphones often comes out with patches that fix synchronization bugs.

💡

If the headphones started to glitch after falling, check the microphone module - often the plume departs from the impact, and this interferes with synchronization.

💡

The most common cause of malfunction is a discharged case, and even if the headphones show charge, a case below 20% may not provide stable synchronization.

FAQ: Answers to Frequent Questions