The situation where your favorite True Wireless headphones suddenly stop connecting to your smartphone is familiar to many owners of MIUI-based devices. You take the gadget out of the case, but the phone is silent or, worse, says, "I couldn't connect." This is a common problem that can be caused by both a software glitch in the Xiaomi shell and a banal discharge of the accessories battery.
Before you panic and bring the device to the service, it is worth understanding the nature of the malfunction. Often it is a case of overcrowded memory of the Bluetooth module or conflict of A2DP profiles. owners of Redmi Note and Poco often find that the system “forgets” previously paired devices after updating the firmware.
In this article, we will go into detail about connection recovery algorithms. We will look at the hidden developer settings, methods for forced reboot of the communication module, and methods for cleaning the cache, which help in 90% of cases. A critical factor is often the version of the Bluetooth codec that is not supported by the current version of MIUI.
Primary diagnostics and basic checks
The most obvious, but often ignored, step is to test the charge, so if the headphones were lying idle for months, their lithium polymer batteries could go into a deep discharge, and in this state, the indicator may not even light up when removed from the case, leave them on charge for at least 30-40 minutes using the original cable or a proven power supply.
The second important thing is pairing mode. Many users forget that for the first connection or re-synchronization, you need to force the headset to search mode, usually holding the touchpads or physical buttons for 5-7 seconds before the indicator flashes in red and blue, without which the Xiaomi phone simply will not see the device in the list of available ones.
It's also worth checking if your headphones are connected to another device right now.The Bluetooth protocol often prioritizes the last active connection.If the headphones are stuck on a tablet or laptop, the Redmi phone can see them, but block the connection, considering the channel is busy.
- 🔋 Make sure that the case and the headphones are charged at least 20 times%.
- 📶 Check if the flight mode on the Xiaomi smartphone is active.
- 🔄 Turn off Bluetooth on all other gadgets within a 10-meter radius.
- 👂 Make sure the headphones are in pairing mode (flashing indicator).
⚠️ Warning: If the headphone light flashes red but doesn't go into search mode, the charging contacts on the device itself may be contaminated.
Profile removal and re-pairing
If the basic checks didn't work, you need to do a clean reconnect. There are sometimes encryption key conflicts in the MIUI shell. The old device profile can interfere with the new connection. You need to completely remove the device from the phone's memory.
Go to the Settings menu → Bluetooth. Find your headphones in the "My Devices" list. Click on the gear or arrow next to the model name and select "Disable" or "Forget the Device." After that, you'd better reboot your smartphone to reset Bluetooth services.
Once you've restarted your phone, turn on Bluetooth again. Put your headphones in your case, close the lid, wait 5 seconds and open again. Now try to find them again. PIN-The standard values are 0000 or 1234.
☑️ Checklist for reconnection
Sometimes cleaning up the Bluetooth cache helps. Go to Settings → Apps → All apps. In the upper right corner, click three dots and select Show System Processes. Find in the Bluetooth list, click Memory, and select Clear. This won't delete your personal files, but resets the communications module settings.
Reset Bluetooth and network settings on Xiaomi
When simple methods don't work, a deeper reset is required. Xiaomi Redmi smartphones have a network reset feature, which will bring Wi-Fi, mobile internet and Bluetooth back to factory values, often addressing issues that have arisen after a failed MIUI update.
To perform the reset, go along the path: Settings → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth. The system will warn you that stored Wi-Fi passwords will be deleted. Confirm the action and wait for the interface to restart.
There is also a hidden method through the engineering menu, but it requires caution. In the Phone app, dial ##6484## to log in. CIT-You can find a Bluetooth test and check the antenna, but the average user would rather limit himself to a standard network reset.
| Resetting method | What's involved | Security | Efficiency |
|---|---|---|---|
| Forget the device | Just specific headphones. | Tall. | Medium |
| Cleaning up the service's cache | Temporary Bluetooth files | Tall. | Tall. |
| Resetting network settings | Wi-Fi, Mob. network, Bluetooth | Medium (passwords must be entered) | Very high. |
| Full reset (Hard Reset) | The whole system and data | Low (Data Loss Risk) | Maximum |
💡
Before resetting your network settings, be sure to write down passwords from important Wi-Fi networks, as they will have to be re-entered.
Compatibility and sound codecs issues
Modern Xiaomi smartphones support advanced codecs like LDAC, aptX HD and LHDC. If your headphones use the old SBC or AAC protocol, and the developer’s settings are forced to set a high bitrate, the connection may be constantly torn or not installed at all.
To check and change the settings, activate the developer menu. To do this, quickly click on the MIUI Version 7 times in the About Phone menu. Then go to Additional → For developers. Find the Bluetooth Audio Codec section.
Try changing the codec to a more compatible one, like SBC or AAC. There's also the option "Bluetooth version" on this menu. If you have older headphones (version 4.0 or 4.2) and your phone is trying to run in 5.0+ mode, there may be conflicts. Try downgrading the version in the settings.