How to synchronize headphones Xiaomi Redmi Airdots with each other: instruction + problem solving

Why Redmi Airdots Headphones Are Not Synced and How to Fix It

Xiaomi Redmi Airdots wireless headphones (including Redmi Airdots 2/3/Pro models) often face the problem of losing synchronization between the left and right modules, manifested by the lack of sound in one earphone, the inability to connect simultaneously or constant communication interruptions, the reasons can be different from software failures to mechanical damage to contacts in the case.

In this article, we will explore all the ways Redmi Airdots synchronize headphones, from basic reset to manual pairing through an engineering menu, and learn how to avoid the typical errors that cause communication to break between modules, and what to do if standard methods do not help.

Important: synchronization procedures may vary depending on the firmware version and headphone model. For example, the Redmi Airdots 3 Pro requires a different approach than the first version of the Redmi Airdots S. We will point out the key differences for each model.

Preparing for synchronization: what to do before the start

Before you start pairing your headphones, follow a few mandatory steps to avoid typical problems, such as misidentifying devices or synchronizing failures.

• 🔋 Charge the case and headphones to 100%. Low charge can interrupt the pairing process. Minimum level for successful synchronization is 30%, but full charge is recommended.
• 📱 Disable your headphones from all devices (smartphone, laptop, PC) via Bluetooth settings. On Android: Settings → Connected devices → Headphones → Forget it.
• 🧹 Clean the contacts on the headphones and in the case with a dry cotton swab. Oxidation or dirt can block data transmission between modules.
• 🔄 Reboot the smartphone you plan to connect your headphones to. Sometimes Bluetooth crashes are due to software errors on the phone.

If you are using Redmi Airdots 2 or a newer model, make sure that the smartphone has the latest version of MIUI firmware installed. Older versions (below MIUI 12) may have conflicts with the Bluetooth 5.0 that these headphones use.

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If the headphones have been left unused for a long time, leave them in the case for 10-15 minutes before synchronization, which will allow the capacitors to stabilize the charge and avoid failures.

Method 1: Standard case synchronization (for most models)

This is the basic method that works for Redmi Airdots, Redmi Airdots 2, Redmi Airdots S and Redmi Airdots 3. If the headphones have previously been paired with a case, this method should work.

1. Place both earbuds in the case and close the lid. Wait 10 seconds - they should automatically start charging (the red light will light up).
2. Remove both earphones from the case at the same time. They should sync automatically (blinking the white indicator on both).
3. Activate pairing mode: Press the button on the case (or touchpad on the headphones) for 5-7 seconds until the indicators start flashing red and white.
4. Connect to headphones via Bluetooth on your smartphone. the list of devices should appear the name Redmi. Airdots_R Mi True Wireless.

If one of the headphones doesn't blink after being removed from the case, try rebooting it: put it back in the case, then remove it again. Sometimes repeated (3-5 times) helps.

Both earphones flash white.|The Bluetooth list shows one device (not two separate devices)|The sound is played in both headphones at the same time.|The indicator on the case is lit in blue (connected)-->

Method 2: Manual pairing through resetting settings

If the standard method doesn't work, you'll need to reset your headphones completely, which will remove all previous connections and force the modules to sync again.

After discharge:

1. Wait until the headphones reboot (the indicators will go out and light up again).
2. Remove them from the case – they should automatically sync (blinking white).
3. Connect to them via Bluetooth as a new device.

Method 3: Synchronize through the Engineering Menu (for advanced users)

If standard methods don’t work, you can try forced synchronization via hidden commands, which is suitable for Redmi Airdots 2/3 and requires the installation of a special application nRF Connect (available for Android and iOS).

Instructions:

1. Install the nRF Connect app from Google Play or the App Store.
2. Place both headphones in the case, then remove them (they should be included).
3. In the app, click Scan and find devices with names Mi_L and Mi_R (left-and-right-headphone).
4. Connect to Mi_R (Right, then go to the Unknown Service section.
5. Find the characteristic with UUID 0000fff1-0000-1000-8000-00805f9b34fb and send the command 01 00 (without quotes).
6. Repeat steps. 4–5 for Mi_L (left-ear headphone).
7. Reboot the headphones (put in the case and retrieve again).

Warning: improper use of the engineering menu can cause the headphones to break, a method only recommended for advanced users.

Common Mistakes and How to Avoid Them

Many users make the same errors when syncing Redmi Airdots, which leads to repeated crashes.

• 🔌 Connect to the headphones separately. If you manually plugged your left or right earphone as a separate device, they'll break the pair. Always connect to a common name (e.g., Redmi). Airdots_R).
• 📵 Ignoring indicators. If the indicators flash red, it's a mistake, not a pairing mode. Red means synchronization failure or low charge.
• 🔄 If synchronization (blinking white) is started, do not put the headphones back in the case and do not press the buttons until the process is complete (usually takes 10-20 seconds).
• 📱 Using outdated firmware. Android 8.0 and below may have problems with Bluetooth 5.0. Update the OS or use another device to pair.

Another common problem is conflict with other Bluetooth devices, where if other headphones, speakers, or smartwatches are running nearby, they can cause interference, and turn off all unnecessary devices before syncing.

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If the headphones have previously connected to another phone, they may “remember” the old device and refuse to sync, in which case be sure to reset (see Method 2).

What to do if nothing helps: hardware problems

If all of these methods fail, the problem is likely hardware, and here are the signs that prove it:

• 🔋 One of the headphones does not charge in the case (the indicator does not burn).
• 🎧 The sound is not in one headphone even after a successful connection.
• 🔌 Headphones are not defined by the cover (do not blink when removed).
• 💥 When connected, there is a crack or noise, then the connection is cut off.

In such cases, we recommend:

1. Check the contacts in the case for oxidation or damage, sometimes with a careful cleaning with alcohol.
2. Try connecting the headphones to another device (such as a laptop or tablet) to rule out a smartphone problem.
3. Contact Xiaomi Service Center. In most cases, hardware breakdowns (for example, the dump of the Bluetooth antenna) are eliminated only by soldering work.

⚠️ Warning: Don't try to disassemble the headphones yourself, it will lead to loss of warranty. Inside, glue joints are used, and after disassembly, it is almost impossible to return them to their original state.

FAQ: Frequent questions about Redmi Airdots synchronization