Xiaomi Bluetooth Not Working — Causes & Fixes (2026)
Fix Bluetooth pairing failures, dropouts and connection issues on Xiaomi, Redmi and POCO phones running MIUI/HyperOS.
Problem overview
Bluetooth issues on Xiaomi phones are disproportionately caused by MIUI and HyperOS's background-process management rather than the Bluetooth radio itself, because the system's aggressive default approach to killing background apps to save battery frequently interferes with the persistent background connection that earbuds, watches and car systems rely on. This makes Xiaomi devices somewhat more prone to Bluetooth dropouts than stock Android phones with an otherwise identical Bluetooth chipset, and it's worth checking MIUI-specific settings before assuming a hardware fault.
The most frequent complaint is a device that pairs successfully once but then fails to reconnect automatically, or drops out intermittently during use. This is very often caused by the companion app (for Mi/Redmi earbuds, the Mi Fitness or Xiaomi Wear app for bands and watches, or a car's manufacturer app) being restricted from Autostart or placed under aggressive battery restriction, which prevents it from maintaining the background service needed to keep the Bluetooth link alive after the screen turns off. Since the fix lives in Settings > Apps > Manage apps > [companion app] > Autostart and Settings > Battery > App battery saver, it's easy to miss if you're only looking at the Bluetooth menu itself.
Interference and channel congestion are a further common, non-Xiaomi-specific but still relevant cause, especially in busy environments with many 2.4GHz Wi-Fi networks and Bluetooth devices nearby, such as offices or flats in dense buildings. Xiaomi phones with dual-Wi-Fi acceleration active can occasionally worsen this, since both radios share similar frequency bands and heavy simultaneous Wi-Fi and Bluetooth activity can degrade audio quality or connection stability.
A cluttered device pairing list is another practical, easily overlooked cause: MIUI retains previously paired device profiles indefinitely unless manually removed, and old profiles for devices no longer in use can occasionally cause a new pairing attempt to fail or connect to the wrong stored profile, particularly with generic or rebranded Bluetooth accessories that share default names or MAC address ranges.
Finally, a MIUI/HyperOS update can introduce a genuine Bluetooth stack regression, and Xiaomi has had specific, model-affecting Bluetooth bugs in past updates that were resolved only by a follow-up patch; these are usually confirmed by checking whether other owners of the same model report the identical symptom after the same update. Where software troubleshooting is exhausted and the fault is reproducible across multiple different Bluetooth accessories, the Bluetooth antenna or chip itself, though less common a cause, should be checked via diagnostic tools.
Possible causes
Companion app restricted from Autostart
Earbud, smartwatch or fitness-band companion apps need to run a persistent background service to maintain the Bluetooth link; if MIUI has disabled their Autostart permission, the connection frequently drops once the screen turns off.
Aggressive battery restrictions on the companion app
Setting a companion app to 'Restricted' under Settings > Battery > App battery saver can prevent it from reconnecting automatically after the phone sleeps, even though Bluetooth itself remains switched on.
Old or duplicate paired device profiles
Stale entries for devices no longer in use, or generic accessories sharing similar names or address ranges, can cause new pairing attempts to fail or connect to an outdated stored profile.
2.4GHz interference from Wi-Fi and other Bluetooth devices
Dense environments with many overlapping 2.4GHz networks and Bluetooth accessories nearby can degrade connection stability and audio quality, independent of any phone-side fault.
Bluetooth stack regression after a MIUI/HyperOS update
Certain updates have introduced genuine Bluetooth bugs affecting specific models, typically confirmed by widespread reports from other owners of the same phone shortly after the same update.
Accessory-side battery or firmware issue
Low battery in earbuds or a watch, or outdated accessory firmware, can cause connection drops that appear to be the phone's fault but originate entirely from the paired device.
Bluetooth cache corruption
MIUI's Bluetooth system app can accumulate a corrupted cache over time from repeated pairing/unpairing cycles, leading to failed connections that a cache clear typically resolves.
Physical or antenna-level hardware fault
Less commonly, physical damage from a drop or liquid exposure can affect the Bluetooth antenna specifically, producing very short range or a complete inability to detect any nearby devices despite Bluetooth showing as enabled.
Quick checks
- Toggle Bluetooth off and on, and toggle Aeroplane mode as well.
- Confirm the accessory has sufficient battery and is in pairing mode correctly.
- Forget the device in Settings > Bluetooth and re-pair from scratch.
- Check the companion app's Autostart permission under Settings > Apps > Manage apps.
- Move away from other Wi-Fi/Bluetooth-heavy devices and retest at close range.
- Check for a pending MIUI/HyperOS update under Settings > About phone > System updates.
- Test the same accessory with a different phone to isolate the fault.
- Clear the Bluetooth app's cache under Settings > Apps > Manage apps > Bluetooth.
Diagnostic tests
Network & Signal
Inspect signal strength, cell ID and neighbouring towers.
Sensors
Test accelerometer, gyroscope, proximity and light sensors.
Relevant Xiaomi codes
Testing & Usage Menu
Opens the Android testing menu: phone info, battery status, cell/Wi-Fi info and usage statistics.
Hardware Test (CIT)
Opens Xiaomi's full component test suite (screen, sensors, camera, speaker).
Step-by-step solutions
1. Restart Bluetooth and the phone
Turn Bluetooth off and back on from the notification shade or Settings > Bluetooth, and if that doesn't help, restart the phone entirely; this clears a temporary radio state fault and resolves a meaningful share of one-off connection failures.
2. Forget and re-pair the device
In Settings > Bluetooth, tap the gear icon next to the problem device and select Forget, then put the accessory back into pairing mode and reconnect from scratch, which clears any corrupted stored connection profile.
3. Enable Autostart for the companion app
Go to Settings > Apps > Manage apps, find the accessory's companion app (Mi Fitness, Xiaomi Wear, or the earbuds' own app), and enable Autostart so it can maintain its background Bluetooth service after the screen locks.
4. Set the companion app's battery saver to No restrictions
In Settings > Battery > App battery saver, select the companion app and choose 'No restrictions' rather than the default or restricted setting, which prevents MIUI from suspending its background connection-maintenance process.
5. Clear the Bluetooth system app cache
Go to Settings > Apps > Manage apps, enable 'Show system apps' if needed, find Bluetooth, and clear its cache (not data, to avoid losing all pairings) under Storage usage; this resolves connection failures caused by accumulated cache corruption.
6. Remove old or unused paired devices
In Settings > Bluetooth, review the full list of previously paired devices and remove any no longer in use, particularly generic or rebranded accessories, to eliminate the chance of a naming or address conflict during a new pairing attempt.
7. Check accessory firmware and battery separately
Confirm via the accessory's own companion app whether a firmware update is available and that the device has adequate charge, since accessory-side issues are a common and easily overlooked cause of what appears to be a phone-side Bluetooth fault.
8. Run the hardware test suite and update MIUI/HyperOS
Dial *#*#64663#*#* to access the CIT diagnostic suite's Bluetooth test where available, and install any pending update from Settings > About phone > System updates, since Xiaomi periodically patches Bluetooth stack regressions affecting specific models.
When to seek repair
If several different, confirmed-working Bluetooth accessories all fail to pair reliably with the phone after Autostart, battery restrictions, cache clearing and a MIUI/HyperOS update have all been checked, and the same accessories pair fine with another phone, the Bluetooth antenna or chip has likely developed a hardware fault. This is uncommon relative to software causes but should be assessed by a technician rather than repeatedly re-pairing, particularly if the phone has previously been dropped or exposed to liquid.
Related guides
Frequently asked questions
- Why do my earbuds keep disconnecting from my Xiaomi phone specifically?
- This is very commonly caused by the earbuds' companion app being denied Autostart or placed under battery restriction, preventing it from maintaining its background connection once the screen locks; enabling Autostart and setting battery saver to 'No restrictions' for that app resolves most cases.
- Does clearing the Bluetooth cache delete my paired devices?
- No, clearing the cache (as opposed to clearing app data) only removes temporary files and does not remove your saved pairings; if you clear data instead, you will need to re-pair all devices from scratch.
- Why does Bluetooth work fine at home but drop constantly at the office?
- This points to interference from a dense concentration of Wi-Fi networks and other Bluetooth devices sharing the 2.4GHz band, which is an environmental factor rather than a fault with your phone or accessory.
- Can a MIUI update really cause Bluetooth to stop working?
- Yes, Xiaomi has had specific Bluetooth stack regressions tied to particular updates and models in the past, usually confirmed quickly by widespread reports from other owners of the same phone, and resolved by a follow-up patch rather than user settings changes.
- Why won't my phone find any Bluetooth devices at all during a scan?
- Check that Location services are enabled under Settings > Location, since some Bluetooth scanning functions on Android require location permission to be active; if scanning still fails with location enabled, a forced restart or, less commonly, an antenna hardware fault should be considered.
- Should I forget and re-pair a device every time it disconnects?
- No, occasional reconnection issues resolve with a simple Bluetooth toggle; only forget and re-pair if the device fails to reconnect repeatedly over multiple sessions, since re-pairing unnecessarily can sometimes introduce new profile conflicts.
- How do I know if it's a hardware fault rather than a MIUI setting?
- If multiple different, known-working Bluetooth accessories all fail to pair or maintain a connection with your phone, while the same accessories work fine with another phone, this points to a Bluetooth hardware or antenna fault requiring professional inspection.