When you stop hearing someone on your Xiaomi Redmi 8 during an important conversation, it can take you by surprise and disrupt your business or personal plans. This is one of the most common complaints of Android smartphone users, and it often involves not a broken speaker, but a software glitch or incorrect setting. In most cases, you can restore normal audibility yourself without contacting the service center.
The main reasons for the lack of sound can be both banal noise-canceling blocking and more complex system process conflicts. Redmi 8 owners often find that after updating the MIUI operating system or installing a new application, the audio settings are confused, and understanding the nature of the failure is the first step to successfully fix it.
In this detailed guide, we will look at all the possible reasons why you can’t hear the other person when calling, and offer step-by-step solutions. We will look at both software methods and hardware nuances specific to Xiaomi’s budget line.
Diagnostics and primary inspection of equipment
Before you go into the complex settings, you need to eliminate the banal physical obstacles. Often users forget that the protective glass or film can be pasted incorrectly, overlapping the speaker. In the Redmi 8 model, the speaker is located at the top of the screen, and even a small layer of glue or dust is able to completely drown out the sound.
Check to see if Do Not Disturb or Silent Mode is on, which can mistakenly block not only the melody of the call, but also the voice of the person you're talking to. It's also worth making sure you're not connected to a Bluetooth headset that's in your bag or in another room, intercepting the audio stream.
To quickly test the speaker, you can run a voice recorder or turn on a YouTube video. If there's sound in the media files and there's no sound when you call, then the problem is in the telephony module or network settings, not in the speaker itself. If there's no sound anywhere, there's a hardware malfunction.
- 🔍 Visually inspect the speaker grid for contamination.
- 🔇 Check the side volume buttons during the conversation.
- 🎧 Make sure all Bluetooth devices are disabled.
- 📞 Make a test call to another number.
⚠️ Note: Do not use sharp objects (needles, pins) to clean the speaker, as you can damage the membrane or puncturing the protective mesh, which will lead to complete breakage.
Sound settings and elimination of software conflicts
The MIUI-based Android operating system has many hidden settings that can affect communication quality. Often the problem is solved by simply switching audio modes or resetting call settings. Redmi 8 can activate the Sound Improvement feature, which, if the noise reduction algorithms work improperly, completely “nags” the voice of the interlocutor.
It’s worth checking if call forwarding or a blacklist feature that can block audio for certain contacts is enabled, and sometimes a forced reboot of the telephony service helps, which clears the cache of temporary errors accumulated during the device’s life.
💡
Reboot your smartphone at least once a week – this helps to clear RAM and reset the hung system processes that affect sound.
If the problem occurs after installing a specific application (such as a new call or number detector), try to remove it. Third-party programs often conflict with the com.android.phone system module, causing audio to be desynchronized.
- 🛑 Disable all third-party number detectors.
- 🔊 Reset the equalizer settings to standard.
- 📱 Check the accessibility settings for hearing-impaired.
⚠️ Note: When you reset your call settings, your saved contacts and call history will not be deleted, but reset your forwarding settings may be reset.
Network and communication mode configuration
Voice quality is directly dependent on the type of network your carrier is using. In some regions, 4G (LTE) coverage can be unstable and the phone tries to use VoLTE (Voice over LTE), but because of the poor signal, the voice packet is lost and you hear silence, in which case a forced switch to 3G or 2G mode helps.
To change settings, go to the Settings menu → SIM-maps and mobile networks → Preferred network type. Select "Only" 3G» or «3G/2G» If you have a voice, you have a problem with the coverage. LTE your operator in the area.
It’s also worth checking whether VoLTE is activated in the SIM card settings, and while this technology is designed to improve quality, it may not work properly on the Redmi 8’s Snapdragon 439 processor on older towers or with a weak signal.
- 📶 Switch network mode in settings SIM-map.
- 🔄 Transfer the phone to flight mode for 10 seconds.
- 📡 Check the balance and services of the operator.
Resetting settings and cleaning the system cache
Accumulation of system debris and errors in the cache of applications can lead to malfunctioning of the communication module. Clearing the cache of the Phone and Contacts application often solves the problem when the call is not heard by the interlocutor, it is a secure procedure that does not delete your personal data.
To do the cleaning, go to Settings → Apps → All apps. Find in the Phone list, click Clear and select Clear Cache. Repeat the same for the Contacts app and System Telephony Service process.
☑️ Checklist for cache cleanup
If a simple cleanup didn’t work, you can try a more radical method, resetting all network settings, which will return APN, Bluetooth and Wi-Fi settings to factory values, which often eliminates conflicts of communication protocols.
| Action. | The way is on the menu | Risk of data loss |
|---|---|---|
| Clearing the cache | Apps → Phone → Memory → | No. |
| Resetting network settings | About the phone → Resetting settings | Wi-Fi passwords |
| Total reset | About the phone → Resetting settings | All data. |
| Update of the PO | About the phone → version of MIUI | No. |
⚠️ Warning: Full Hard Reset will delete all your photos, contacts and apps. Be sure to back up your data before doing this.
Updating firmware and system components
Xiaomi regularly releases security and stability updates for the MIUI system, which often contain bug fixes for the communication module. If you have an old firmware version installed, the problem with the lack of sound may be a known bug that has already been fixed by developers.
Check for updates via the About Phone → MIUI menu. Click on the system logo to run the check. If a new update is available, download and install it, making sure that the battery is at least 50%.
What to do if there are no updates?
It is also important to update all system applications through the built-in GetApps store or Google Play, especially with the Google Play Services, Google Phone (if used), and Miui system components.
- 🆙 Check for updates in the About Phone section».
- 📲 Update all apps in the store.
- 🌍 Check the relevance of the region in the settings.
💡
Regular firmware updates are the most effective way to eliminate software errors related to the communication module and sound.
Hardware malfunctions and repairs
If none of the software methods worked, there is a high probability of physical failure. In Redmi 8, the speaker can fail due to moisture, dust or just wear. Also (a common problem) is the drift of the speaker plume after the device falls.
Another reason may be a malfunction of the audio codec on the motherboard, which requires professional diagnosis using a multimeter and soldering equipment. It is not recommended to climb inside the case without experience, as it can damage the plumes or screen when opening.
To check, you can gently (without fanaticism) tap your finger on the back cover in the area of the top speaker during the call, if the sound is intermittent, then the contact is there, but it is broken, in which case only the replacement of the speaker or the soldering of contacts in the service center will help.
- 🔨 Carefully check the speaker's response to light tapping.
- 💧 Check the humidity indicators (if available).
- 🛠️ Contact the service if you suspect a trail departure.
⚠️ Warning: If the phone falls into water, do not put it on the battery or hot dryers in any case – this can damage the battery and screen.