Xiaomi AirDots 2 wireless headphones (also known as Redmi AirDots 2) remain among the most popular TWS-But many users have a problem: after buying or resetting the settings, the left and right headphones stop working synchronously, one connecting to the phone, and the other silent or making late-motion sounds. The reason lies in the violation of headphone pairing (pairing), which is responsible for synchronizing the audio stream between devices.
In this article, you will find 3 proven ways to pair AirDots 2 with each other, including hidden features that are not mentioned in the official instructions.
- 🔹 Why headphones “disconnect”** and how to prevent it (spoiler: not only the reset, but also firmware updates are to blame)
- 🔹 Step-by-step instructions with photo** for Android and iOS (including models without any other options) NFC)
- 🔹 What to do if one earphone does not respond to buttons or flashes red
- 🔹 Table of error codes** by flashing indicators (this will speed up diagnosis)
All methods have been tested on V5.2.8 firmware and later. If your AirDots 2 is released before 2021, check the FAQ section - there are separate recommendations for old revisions.
1. Causes of the pairing gap between AirDots 2
Before you start setting up, it's important to understand why the headphones stopped working together, and 80 percent of the time, one of three things is the problem.
- 🔋 Battery discharge up to 0% in one of the headphones, if the left or right module is completely sat down, it automatically falls out of the pair.
- 📱 Conflict with a Bluetooth device. For example, if you plug your headphones into a laptop and then try to use them with your smartphone, you might have a protocol failure. A2DP.
- 🔄 Software reset (through button retention or Bluetooth menu) and then the headphones return to factory settings, including breaking the pair.
Less commonly, mechanical damage (such as contact oxidation in a case) or firmware from third-party developers is to blame. If you've been updating software through unofficial sources, return the stock version - this can solve the problem without additional manipulation.
2. Method 1: Standard case pairing (for most cases)
This method works if:
- 🔹 Both headphones are charged (indicators burn white when the case is opened)
- 🔹 None of the modules flashes red (this indicates an error)
- 🔹 You didn't change the headphone firmware.
Instructions:
- Place both earbuds in the case and close the lid for 10 seconds. Then open it, the lights should light up white.
- Press and hold the button on the case (back) for 15-20 seconds until the indicators start flashing alternately red and white.
- Wait for synchronization: after 5-10 seconds, both indicators should light up white at the same time (this is a signal of successful pairing).
- Connect to the phone: open the settings → Bluetooth and select Redmi AirDots_2_R (right-hand-headphone).
☑️ Pre-conjugation check
If the lights keep blinking alternately for longer than 30 seconds, then the pairing failed. Go to Method 2.
⚠️ Note: Do not press the button on the case for more than 25 seconds - this can lead to a complete reset, after which you will need to re-attach to the phone.
Method 2: Manual pairing through buttons on headphones
This method will be useful if:
- 🔹 The case does not respond to the press of the button
- 🔹 One of the headphones flashes red.
- 🔹 You've changed firmware before.
Algorithm of action:
- Take both headphones out of the case and turn them off (press the button on each for 5 seconds until the indicator goes out).
- Turn on the right earphone (he is the lead): press the button for 3 seconds until it blinks white.
- Activate the pairing mode on the right earphone: press the button again, but now hold on for 10 seconds until the indicator starts flashing red and white alternately.
- Turn on the left earphone (press the button for 3 seconds) and bring it to the right at a distance of 1-2 cm.
- Wait for synchronization: in 5-7 seconds, both earbuds should blink white at the same time 2-3 times, and then they are ready to connect to the phone.
Critical: If the left earphone doesn't respond to the right earphone in step 4 (it doesn't flash white), then the firmware is damaged, and then only flashing through the PC will help.
💡
If the headphones don't sync from the 5th try, try connecting them to another phone (like Android 10+).Sometimes the conflict arises because of the Bluetooth cache on the main device.
Method 3: Flashing through Mi Fit (for advanced users)
If the first two methods didn't work, the problem could be in the damaged firmware, which can be repaired through the official Mi Fit app (Android only), which is important: it resets all the headphone settings, including connection history.
Step-by-step:
- Install Mi Fit from Google Play (version no lower than 4.6.0).
- Open the app, go to Profile → Devices → Add device → Headphones → Redmi AirDots 2.
- Follow the instructions on the screen until you reach the “Firmware Update” stage.
- Confirm the update and wait until it is completed (don't interrupt the process!) The headphones will reboot and their indicators will light up white.
- When you update, you'll automatically pair. If you don't, then do Method 1.
| Symptoms. | Probable cause | Decision |
|---|---|---|
| One earpiece flashes red, the other white. | Battery discharge or synchronization failure | Charge both earbuds to 100%, then perform Method 2 |
| Both earphones flash red. | Critical firmware failure | Fly through Mi Fit (Method 3) |
| Headphones are connected separately, but not together | Bluetooth profile conflict | Remove the device from the list of connected devices in the phone, then execute Method 1 |
| The sound is only in one headphone. | Disrupted balancing of audio channels | Reset your headphone settings (Method 2, Step 1) |
⚠️ Warning: If the headphones stop turning on after flashing (the indicators don't burn), check the contacts in the case for oxidation. Rub them with alcohol and re-charging them.
5. Common Mistakes and How to Avoid Them
Even when you follow instructions correctly, users often make mistakes that interfere with pairing.
- 🚫 Ignoring indicators, for example, if the left earbud flashes red and you try to pair it with the right, it's useless. First, solve the problem with the red indicator (charging or resetting).
- 🚫 Using a non-original case: Cheap substitutes often don't provide the right contact for charging and synchronizing.
- 🚫 If you release the button on the case before the time (before flashing in red/white), the pairing will not begin.
- 🚫 Connect to the phone before sync, first the headphones have to "see" each other, and then the phone.
Proven life hack: If the headphones refuse to mate, try connecting them to a TV or laptop (via Bluetooth). Sometimes this "wakes up" the modules and they start working correctly.
What if the headphones are connected, but the sound is delayed?
6. How to check that the pairing has been successful
It is not enough to see the lights on white, but here are 3 tests that will confirm the performance of the couple:
- Connection test: 🔹 Open Bluetooth settings on your phone. 🔹 The list of devices should display one device – Redmi AirDots_2_R (two-way!). 🔹 Click on the gear icon next to the name – the information should indicate “Stereo” (not “Mono»).
- Sound test: 🔹 Turn on music and alternately close each headphone with your palm. 🔹 The sound should switch completely between the headphones (if the left is closed, the sound goes only in the right, and vice versa).
Microphone test
- 🔹 Write down a voice message (for example, on WhatsApp).
- 🔹 The voice should be recorded equally clearly, no matter which earpiece is closer to the mouth.
Note: Do not try to disassemble the headphone yourself - this will lead to the loss of warranty (if it is still valid).