Why you can’t hear the interlocutor in the phone Xiaomi Redmi 8 – all the reasons and ways to fix

The problem of not hearing the other person (or not hearing you) while calling the Xiaomi Redmi 8 can come up suddenly — and it's always stressful. The phone is working, the screen is reacting, but the sound is either completely absent or distorted beyond recognition. In 80% of cases, it's not the fault, but the software failures or the wrong settings. However, you can not ignore the problem: it can signal serious malfunctions of the speaker, microphone or even the motherboard.

In this article, we’ll look at all the possible causes, from the most obvious (like accidentally switched on “In the plane” mode) to rare hardware defects. You’ll learn how to diagnose a problem yourself, which settings to check first, and when to carry your phone to the service center. For convenience, we’ve compiled step-by-step instructions with screenshots, a symptom table, and even a test to check the microphone and speaker.

Important: If the problem occurs after a phone drop, moisture or self-disassembly, immediately go to the section on hardware malfunctions.

How to accurately identify the problem: symptoms and diagnosis

Before you start to fix it, you need to understand what exactly does not work:

• 🔇 You can’t hear the other person – the problem is in the dynamics or the sound settings.
• 🎤 The interviewer can’t hear you – the microphone or the blockage on his side is faulty.
• 🔄 The sound is interrupted or distorted – network, antenna, or codec problems.
• 📵 The call is reset after a few seconds - there may be failures in the firmware or communication module.

Do a quick diagnosis:

1. Call another number (for example, a landline phone) - so you eliminate problems on the side of the interlocutor.
2. Try using a speakerphone or headphones – if the sound appears, the main speaker is to blame.
3. Record a voice message to a recorder - if the recording is not played, the problem is in the microphone.

If the phone falls or gets wet, don't turn it on or try to call, which can make the short circuit worse, so turn off the device and call the service right away.

Programmatic reasons: settings and software failures

In 60 percent of cases, the problem is solved without disassembling the phone.

1. "On the plane" or "Do not disturb" mode

It seems obvious, but many people forget that these modes can block sound during calls.

• 🛫 Open the Notification Curtain and make sure the Flight Mode button is not active.
• 🔔 Go to Settings. → Sound and vibration → Do not disturb and turn off the mode.

2. Sound settings during the call

Redmi 8 has separate volume controls for media and calls, and maybe the sound is just reduced to zero.

• 🔊 During the call, press the volume buttons - a slider with a tube icon should appear on the screen.
• 📱 Check in Settings → Sound and vibration → Volume, is the slider "Call" dropped".

3. Resetting the sound settings

If the regulators do not respond, reset the sound settings to the factory:

1. Open Settings → System and device → Resetting settings.
2. Select "Resetting Sound Settings" (not to be confused with a full reset!).
3. Confirm the action and restart the phone.

If the sound does not appear after these manipulations, proceed to the next section.

Application and firmware conflicts

Failures in the operation of sound during calls often cause:

• 🤖 Older versions of the old version MIUI There were bugs with audio drivers.
• 📱 Third-party applications, especially optimizers, antiviruses or modified firmware.
• 🔄 A recent update that broke the sound (often after major updates) MIUI).

1. Firmware update

Check the relevance of the software:

1. Go to Settings → About the phone → System update.
2. Click on "Check Updates" and install the latest version of MIUI.
3. If the update doesn’t help, try to roll back to the previous version (instruction below).

Conflicting annexes

Some programs (such as Greenify, Battery Doctor, or Parallel Space) can block access to a microphone or speaker to find the culprit.

1. Download your phone to Safe Mode (press the power button) → Hold "Switch off" → Select "Reboot in Safe Mode").
2. Try calling – if a sound appears, one of the installed apps is to blame.
3. Remove suspicious programs one by one, checking the sound after each deletion.

Attention! If the problem occurred after rooting or installing custom firmware, there is a high probability that the system files were corrupted, in which case only a complete flashing through Fastboot will help.

Network problems and SIM-card

Sometimes the reason for the lack of sound is a malfunction in the mobile network, this is especially true if:

• 📶 Calls are reset in 1-2 seconds.
• 🔄 The sound only appears when using Wi-Fi calls (VoWiFi).
• 📱 The problem arises only with one SIM-card (if there are two of them).

1. Reboot the communication module

Reset the network settings:

1. Open the Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-map → "Resetting network settings".
3. Restart the phone and check the sound.

Problems with the operator

Some operators (such as Tele2 or Iota) can block voice traffic when:

• 💳 Money in your account (even if the internet is working).
• 📡 Failures in the billing system (check the status of services on the operator's website).
• 🔄 Activate new rates (sometimes you need to restart your phone).

To check if the operator is to blame:

1. Put it in. SIM-Card to another phone and try calling.
2. Call Redmi 8 to the operator number (e.g. *111# for MTS) – if the voice menu is working, the problem is not network.

💡

If you have a dual-band SIM-map (e.g. for 4G/5G), Try inserting it into another slot on your phone, and sometimes it's because the second module is not working properly.

3. VoLTE and VoWiFi settings

On Redmi 8, the sound problems can be related to the technology.

• 📞 VoLTE (voice through voice) 4G) — Sometimes it shuts down automatically.
• 📶 VoWiFi (wi-fi calls) – may conflict with regular calls.

To set up:

1. Go to Settings. → SIM-maps and mobile networks → [Yours. SIM] → Voice communications.
2. Make sure that the options “VoLTE” and “Call over Wi-Fi” (if supported by the operator) are enabled.
3. If there is no option, update the firmware or contact the operator for activation.

Hardware malfunctions: what breaks down in Redmi 8

If the software methods didn't work, the problem is probably the hardware. Xiaomi Redmi 8 most often fails:

Attention! If the phone falls, gets wet or disassembles, don't try to fix it yourself. Wrong actions (such as heating up a hair dryer or pouring alcohol) can permanently disable the motherboard.

How to check the speaker and microphone

For diagnosis, use the engineering menu:

1. Open the Phone app and dial ##4636##.
2. Select "Phone Information" → Scroll down to the Audio block".
3. Check all the tests (speaker, microphone, headphones) if there's a red cross next to the point, the component is faulty.

💡

If the engineering menu is not available, use third-party testing apps like Phone Doctor Plus or TestM (available in the Play Market).

What to do if your phone is wet

If Redmi 8 has been in contact with liquid:

1. Turn off your phone immediately (don’t press the buttons!).
2. Extract. SIM-memory-card.
3. Wet the body with a napkin (do not shake or blow!).
4. Place your phone in a silica gel bag (not rice!) for 24 to 48 hours.
5. Do not turn it on until you make sure the inside is dry.

If the sound does not appear after drying, bring it to the service. Corrosion on the contacts can progress even months after moisture hits.

Step-by-step solutions: from simple to complex

We'll put all the methods together in one algorithm. Start with the first one and go down until the problem is solved.

1. Soft reset (Soft Reset)

Sometimes a simple reboot with cache cleaning helps:

1. Press the power button for 10 seconds until the phone turns off.
2. Wait 30 seconds and turn it on again.

2. Reset to factory settings

If the problem occurs after installing apps or updating, do Hard Reset:

1. Make a backup copy of the data (photos, contacts, messages).
2. Go to Settings → About Phone → Resetting → Resetting all settings.
3. Confirm the action and wait for the reboot.

Attention! After the reset, the phone will return to the "out of the box" state, and all data will be deleted, including accounts and passwords!

3. Flashing through Fastboot

If the reset did not help, and the problem is clearly software - reflash the phone manually:

1. Download the official firmware for Redmi 8 from the Xiaomi website.
2. Install the Mi Flash Tool on your computer.
3. Connect your phone in Fastboot mode (clip Power + Volume down).
4. In the program, select the downloaded firmware and press "Flash".

This method will return the phone to “clean” firmware, but will require unlocking the bootloader (if not unlocked earlier).

Frequent Sound Questions in Xiaomi Redmi 8