MIUI's sound settings are split across more menus than stock Android, a Sound & vibration screen, a separate Do Not Disturb schedule, and per-app notification channels, so silence on a Redmi is often one of those layers muting things rather than a hardware fault.
- 1Press the volume rocker and tap the small settings icon that appears to expand Media, Ring and Alarm volumes separately, confirm none are at zero.
- 2Settings → Sound & vibration → confirm the phone isn't in Silent or Do Not Disturb mode, MIUI's DND scheduling can re-trigger silently at the same time daily if you set one up and forgot.
- 3Run our Decibel Meter or Speaker Stereo Test while playing audio to check whether sound is present but faint versus fully silent, this separates a settings issue from hardware.
- 4Physically check the bottom speaker grille next to the USB-C port, budget Redmi phones are especially prone to lint clogging since the grille holes are small and low to the ground in a pocket.
- 5Try our Speaker Cleaner tool to run a tone pattern that helps shake trapped dust or moisture free from the grille.
- 6Check Settings → Additional settings → Accessibility → confirm 'Mono audio' isn't enabled, which can make stereo speaker phones sound like only one channel is working.
- 7Rule out a stuck Bluetooth connection, MIUI reconnects to previously paired devices aggressively in the background, check Settings → Bluetooth for anything auto-connected and routing sound away silently.
Tip: If sound is muffled specifically during calls, check Settings → Apps → Manage apps → Phone/Dialer → Storage → Clear cache, a corrupted call-audio cache is a known MIUI-specific cause of muffled or silent call audio that doesn't affect media playback.