First check whether the sound is missing from media, calls, notifications or only one accessory. Xiaomi, Redmi and POCO phones have separate volume controls and audio routes. A Bluetooth connection or the wrong slider can look like a broken speaker.
Match the symptom to a useful test
| Problem | Try first |
|---|---|
| Music or video is silent | Adjust media volume while it plays and test another app. |
| Only calls are quiet | Adjust call volume during a call; compare the earpiece and speakerphone. |
| Only alerts are missing | Check Silent, Do Not Disturb and the relevant app’s notification settings. |
| Audio goes to headphones or the car | Check the selected output and disconnect that accessory for a test. |
| Volume changes or screenshots appear by themselves | Remove the case and check for stuck physical buttons. |
| Only one app fails | Restart that app and check its own audio controls before resetting the phone. |
Check Bluetooth and headphone detection
Disconnect a headset or car system and test the phone’s speaker. Xiaomi’s no-sound guide notes that an app may pause when Bluetooth disconnects, so start playback again before judging the speaker.
If a headphone icon remains with no wired headset connected, check the port for a detection problem. Do not insert metal objects or force a plug into it. Use the cleaning guidance for your exact phone or ask service support if the indicator stays on.
Compare the earpiece, speaker and microphone
A clear speakerphone call with a quiet earpiece suggests a different issue from all audio being silent. Calls that cut in and out can also involve reception; compare another location before assuming the speaker is faulty.
For microphone complaints, make a recording and play it back through a working output. A microphone problem and a playback problem need different checks. Also test without a connected wireless microphone or headset.
Use the supported speaker test, if available
Xiaomi’s guide lists *#*#6484#*#* for entering CIT hardware detection and selecting a speaker test. Availability can vary by model and software. Use only the diagnostic test described for your phone; do not change unrelated service settings.
The old instruction to tap Kernel Version five times is not a universal route for every MIUI or HyperOS phone. A test result is useful information for support, not a promise that every fault can be fixed at home.
Do not treat higher volume as a repair
Changing region or installing a volume-booster app is not a general fix for a stuck button, blocked grille or damaged speaker. Check the case and openings, and follow the manufacturer’s cleaning method. Do not use a compressed-air gun or liquid simply because an old tutorial recommends it.
Xiaomi’s low media-volume guidance includes checking for blockage and current system updates. Before a factory reset, back up files and account-recovery details and understand what will be erased. Persistent distortion, liquid damage or failed hardware tests are reasons to contact service support.
For visual clues, compare our status-icon identification guide as an example of system versus app indicators; use Xiaomi’s own model guide for the actual icon. For update problems, see Xiaomi update checks.
Information checked October 13, 2026, using the guides linked above.