Badly audible interlocutor on Xiaomi Redmi Note 7: causes and correction

Have you noticed that while talking on the Xiaomi Redmi Note 7, the person who is not hearing your voice is bad and the sound is interrupted or distorted? This problem occurs in many users, and its causes can be due to software failures and hardware malfunctions. Unlike modern flagships, budget models like the Redmi Note 7 are more likely to suffer from such defects due to the simplified design of microphones and antennas.

In this article, we will look at all possible causes of hearing loss, from the usual pollution of the speaker to serious motherboard breakdowns. You will learn how to diagnose the problem yourself, which settings to check first, and when to contact the service center.

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

How to determine the cause of poor hearing

Before you start repairing, you need to understand what exactly went wrong, and the sound problems during the calls on the Redmi Note 7 fall into three categories:

• 📱 Software failures – firmware errors, application conflicts, or incorrect settings.
• 🔊 Microphone problems – physical contamination, damage or disconnection of contacts.
• 📡 Network malfunctions - weak operator signal, problems with SIM-map.

First, check:

1. Does the person only hear you while calling, or does the problem also manifest itself in voice recordings (like WhatsApp)?
2. Do you use a headset or Bluetooth headphones? Turn them off and check the sound through the main microphone.
3. Is there a problem with just one? SIM-This will help identify problems with the tray or antenna.

If you use Redmi Note 7 with custom firmware (not a single one) MIUI), There is a high risk that the problem lies in the incorrect assembly of software, in this case, only flashing on the official version will help.

Software solutions: settings and resetting

In 60 percent of cases, the Redmi Note 7's poor hearing is due to software errors.

1.Reboot and check for updates

It sounds trivial, but it often helps (10-15 before the vibration, it will reset the temporary errors of the communication module:

• 📲 Go to Settings. → The phone. → Update the system and install the latest patches.
• 🔄 If there are no updates, try manually downloading the latest version. MIUI Redmi Note 7 (codename lavender) from Xiaomi official website.

2. Resetting network settings

Incorrect mobile network settings can cause interference during calls.

1. Open the Settings. → SIM-maps and mobile networks → Resetting network settings.
2. Confirm action. The phone will reboot, and the settings will be set. APN back to the factory.

💡

If the Internet is lost after resetting, manually add APN You can find the settings on the website of Beeline, MegaFon or MTS.

3. Disable VoLTE and VoWiFi

VoLTE technologies (voice on) 4G) VoWiFi and VoWiFi (wi-fi calls) often conflict with the Redmi Note 7 hardware:

• 📵 Turn off VoLTE: Settings → SIM-maps and mobile networks → [choose SIM] → Use VoLTE (switch the slider).
• 📶 Turn off VoWiFi: Settings → SIM-maps and mobile networks → Wi-Fi calls.

If the quality of communication has improved after that, the problem lies in the unstable operation of these functions on your firmware.

Verification of permits for the Phone application

Sometimes, after updates, the permissions to access the microphone are lost.

1. Settings → Annexes → Application management → Phone.
2. Select Permissions and make sure that microphone and phone access is enabled.

Cleaning and checking microphones

The Redmi Note 7 has three microphones:

• 🎤 Main (below, next to the connector) USB-C) — call-in.
• 🎤 The second (top, next to the speaker) - for noise reduction.
• 🎤 Third (in the camera module) - for recording video.

If the person who is not hearing you is only making calls, the problem is the main microphone, and if the sound is distorted in the recordings, it could be either of them.

How to Clean a Microphone

Dust and dirt are common causes of poor hearing.

1. Take a toothpick with cotton wool (not metal objects!).
2. Carefully scroll around the microphone grille (don’t press!).
3. Use a spray of compressed air to blow out dust.

Checking the microphone through the engineering menu

To make sure the microphone is working:

1. In the phone app, dial the code ##4636##.
2. Select Information → Microphone Test.
3. Speak to the microphone – if the band does not respond or shows a low level, the microphone is faulty.

Important: some firmware has blocked the engineering menu, in which case use apps like the Microsoft Test from Google Play.

Problems with SIM-map-and-net

If the problem is only one of SIM-The card, it may be the fault:

• 📱 Tray SIM-cards - oxidation of contacts or loose fit.
• 📶 Poor network coverage – the operator may limit the quality of communication in your area.
• 🔄 Conflict of the two SIM — Redmi Note 7 doesn’t work well with two active cards.

How to check:

1. Try calling someone else. SIM-Cards (if dual-SIM phone).
2. Remove and re-insert. SIM-map, pre-wipe contacts with a lastic (not alcohol!).
3. Check the signal level in Settings → SIM-maps and mobile networks → [choose SIM] → Signal level.

⚠️ Note: If you are using a virtual SIM (eSIM) via an adapter, the problem may be incompatibility. Redmi Note 7 does not officially support eSIM, and such adapters often cause communication failures.

Hardware malfunctions: when a workshop is needed

If the software methods didn't work, the problem is the hardware. Typical Redmi Note 7 malfunctions:

• 🔌 Mik plume disconnection – often occurs after falls or disassembly.
• 💧 Oxidation of contacts - due to moisture (even without complete flooding).
• 🔊 Damage to the sound chip – on the motherboard (often after unsuccessful firmware).
• 📡 Breakdown of the antenna module – the phone does not catch the network at the proper level.

How to diagnose:

Run the test:

1. Call from your phone to another phone and check if the person you are listening to hear you.
2. Turn on the recorder and record your voice - if the recording is distorted, the microphone is to blame.
3. Try calling via WhatsApp or Telegram – if the sound is clear, the problem is in the cell phone module.

If the phone falls into the water, even briefly, there's a risk of corrosion on the board, and only professional ultrasound cleaning will help.

⚠️ Warning: Self-disassembly of the Redmi Note 7 without experience is fraught with damage to the plumes.

Cost of repair (example prices)

💡

If the phone is warranty, DO NOT disassemble it yourself! Xiaomi may refuse to repair under warranty in the wake of autopsy.

Temporary solutions if repair is not possible

If you can’t immediately give your phone to the service, try these methods:

• 🎧 Use a headset – connect wired headphones with a microphone (even the cheapest will give a better sound than a damaged built-in microphone).
• 📞 Call via messengers – WhatsApp, Telegram or Viber use the Internet to transmit voice, bypassing cellular problems.
• 🔇 Turn on speakerphone – sometimes the main microphone works better in this mode (but there should be no noise around).
• 🔄 Switch to the switch. 2G — In Settings → SIM-map → Preferred network type select only 2G. Communication quality will deteriorate, but stability may improve.

If you make frequent calls in noisy places, try noise-cancellation apps like Krisp or NVIDIA RTX Voice (works on phones via Bluetooth).

How to Prevent Sound Problems in the Future

To avoid repeated microphone and communication issues on the Redmi Note 7:

• 🚫 Don’t drop your phone – even a small impact can displace the microphone module.
• 💧 Avoid moisture – do not use your phone in the rain or put it in the bathroom while swimming.
• 🔄 Regularly update your firmware – Xiaomi often fixes communication bugs in new versions MIUI.
• 📱 Don’t overload your phone – close out background apps that may conflict with the communication module.
• 🛠️ Clean the connectors once in a while. 2-3 squash USB-C and compressed air microphones.

If you talk on the phone often, consider buying an external Bluetooth microphone (such as Xiaomi Bluetooth Neckband) that will reduce the load on the built-in microphone and improve the sound quality.

💡

On the Redmi Note 7, it is especially important to avoid overheating - in temperatures above 45°The C sound chip may fail.

FAQ: Frequent questions about sound issues on the Redmi Note 7