Why is the POCO X7 Pro lower speaker not working properly?

Step 1 — Test Media, Calls, Ringtones, and Notifications

Identify whether the issue affects:

• Only videos and music?
• Calls?
• Ringtone and notifications?
• All audio?

A problem limited to one app may be related to that app, its audio settings, or the type of content being played. If the issue affects calls, media, ringtones, and notifications, system-level or hardware-related causes should also be investigated.

Step 2 — Check Audio Balance and Output Routing

One possible cause of apparent missing sound from one speaker is the Audio Balance setting.

Go to:

Settings → Additional settings → Accessibility → Hearing → Audio balance

Xiaomi recommends keeping the Audio Balance slider centred so that sound is distributed between both speakers.

If the slider is already centered and the imbalance is severe or appeared suddenly, further testing is needed to determine whether the cause is software-related, audio routing, or hardware.

Also check whether Bluetooth, wired audio, casting, or another connected device is receiving the sound. In some cases, a "speaker not working" problem is actually an audio output routing issue.

Step 3 — Check the Case, Speaker Grille, and Earpiece Opening

The POCO X7 Pro uses a stereo speaker system with an upper earpiece speaker and a lower speaker opening. Check for:

• Phone case or screen protector blocking the earpiece or speaker openings
• Dust or debris in the speaker grille

Xiaomi recommends wiping the speaker area gently with a dust-free cloth to remove any obstruction.

Step 4 — Check for Recent Water or Moisture Exposure

If the phone was exposed to water, follow Xiaomi's drying guidance and avoid charging it while moisture may still be present.

Natural drying time can vary, and persistent symptoms may require professional inspection. Xiaomi advises against using a hair dryer on the speaker or microphone holes, as this can damage them.

Step 5 — Restart the Device

A simple restart can clear temporary audio routing glitches. Some users report that speaker issues are intermittent and resolve temporarily after a restart.

Step 6 — Check for HyperOS and Audio-Processing Issues

Some owners have reported intermittent or persistent speaker failures after HyperOS updates. These reports do not establish whether the cause is a system bug, audio routing problem, or hardware failure.

A separate issue was officially acknowledged by Xiaomi: speaker noise at high volume caused by mismatched audio parameters. Xiaomi states this was not a hardware failure and was addressed in a system update.

Xiaomi recommends installing the relevant system update through OTA. However, this documented issue concerns speaker noise at high volume and should not automatically be treated as the cause of every lower-speaker failure.

Step 7 — Run a Hardware Diagnostic

If Xiaomi's hardware diagnostic menu is available on your device, use the relevant speaker test. Its result can provide useful evidence, but it does not always rule out software or audio-routing problems.

Depending on the software version, CIT may be accessible through the phone's hardware diagnostic settings or by using Xiaomi's supported hardware-test entry method. The menu name and available speaker tests can vary by ROM and region.

Troubleshooting Order

1. Test media, calls, ringtones, and notifications.
2. Check Audio Balance and audio output routing.
3. Check the case, speaker grille, and earpiece opening.
4. Check for recent water or moisture exposure.
5. Restart the device.
6. Check and install the latest available OTA update.
7. Run the hardware diagnostic if available.
8. Use Safe Mode if a third-party app may be involved.
9. Seek service if the problem persists or the diagnostic indicates a possible hardware fault.

Final Verdict

The POCO X7 Pro lower speaker can stop working properly for several reasons, including audio settings, blocked openings, moisture, software glitches, and hardware failure. Check the Audio Balance setting, inspect the speaker grille, rule out moisture, and install available OTA updates before assuming the speaker is defective. If the problem persists across apps and updates, run a hardware diagnostic or contact Xiaomi service.