Why Xiaomi Redmi Note 7 quietly hears the interlocutor during the call – a full analysis of the causes and solutions

The problem with low sound when calling on the Xiaomi Redmi Note 7 is one of the most common complaints of users of this model: you call a friend or colleague, you put the phone to your ear, but the voice of the interlocutor is barely distinguishable, you have to strain or switch to speaker. What is it: is it the speaker, microphone, firmware or something else? This article will help you systematically understand the problem, from basic settings to hardware malfunctions.

We looked at the feedback from Redmi Note 7 owners, Xiaomi's technical documentation, and the service center's recommendations, and it turned out that there could be more than a dozen reasons for quiet sound, from the banal contamination of connectors to hidden board defects. It's important to understand that if the problem came suddenly, it's likely a software failure. If the sound deteriorated gradually, it's the physical wear of the components.

First, check the obvious: whether you have Quiet Call mode in your audio settings, sometimes users accidentally activate it through the side volume button or in the Quick Settings menu, and make sure that the person is not subject to volume restrictions on the part of their operator (for example, when roaming), if these moments are not related to this, read on.

1. Checking basic sound settings

To start with, the simplest of them is the volume settings and the MIUI audio profiles, which are often solved in two clicks, but many users miss this step by immediately sinning for hardware malfunctions.

Open Settings → Sound and vibration and check the following parameters:

• 🔊 Loudness of the call: Move the slider to maximum. Sometimes it gets lost after updating or resetting the settings.

It's also worth checking the individual volume settings for each contact. MIUI has a feature that allows you to assign different sound levels to different subscribers. Open the contact, click Edit → Sound settings and make sure that there is no minimum value.

2.Displayer and connector pollution is a hidden cause of bad sound

Redmi Note 7, like many Xiaomi budget smartphones, does not have a certification of protection against dust and moisture (IP-This means that over time, dirt gets into the speakers’ connectors and holes, which physically blocks the sound waves, especially for users who carry a phone in their pocket with coins, keys or in dusty conditions (for example, on a construction site).

How to check:

• 🔦 Light the top of the phone (where the speaker is located) with a flashlight, if you see a layer of dust or fibers, the problem is found.
• 🧲 Check the magnetic connector (if you use magnet covers): sometimes metal shavings stick to the speaker.
• 💧 Eliminate moisture: even condensation after a sharp temperature drop can cause corrosion of contacts.

Do not use sharp objects (toothpicks, needles) to clean, you risk damaging the speaker membrane. You should use a soft brush (for example, for makeup) or a can of compressed air. If the dirt is deep inside, contact the service center.

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To prevent dust, stick a special protective net on the speaker (sold in phone accessories stores).

3. Software failures: firmware, updates and MIUI bugs

Xiaomi Redmi Note 7 was released in 2019, and during this time it received dozens of MIUI updates. Unfortunately, some of them contained bugs that affect sound. For example, after upgrading to MIUI 12.5, many users complained about a sharp decrease in the volume of the conversational speaker.

• 🤖 Use custom firmware (e.g. LineageOS or Pixel Experience).
• 🔄 Incomplete update (when the firmware file has downloaded with an error).
• 🧹 Resetting settings without further setting up the audio profile.

How to diagnose:

1. Check the current version of MIUI in Settings → About Phone.
2. Read reviews on forums (like 4PDA or Mi Community) – your firmware version may be known for a sound bug.
3. Try rolling back to the previous version or installing the update manually through Settings → System Update.

Critical information: If the problem occurred after upgrading to MIUI 13+ on the Redmi Note 7, there is a high probability of conflict with the iron.This model does not officially support MIUI 13, and installation through informal methods often breaks the sound.

Check out MIUI | Install the latest update | Turn off audio effects |Reset the sound settings to factory ones |Try to roll back on the old firmware-->

4.Microphone problems: why the interlocutor does not hear you well

Sometimes users confuse two different problems:

⚠️ Attention: If you can hear someone quietly, it's your phone speaker's fault. If you can't hear them, the microphone is a problem.

The Redmi Note 7 has two microphones:

1. The main microphone (below, next to the USB-C connector) is responsible for voice during calls.
2. Noise-canceling microphone (top, next to the speaker) – improves sound quality.

If the person complains of a quiet or intermittent sound, follow the following steps:

• 🎤 Check the main microphone for contamination (blow the hole carefully).
• 🔇 Turn off the noise reduction function in Settings → Sound. → Quality of calls – sometimes it malfunctions.
• 📱 Restart your phone and check the microphone in another app (like a voice recorder).

5. Hardware malfunctions: speaker, plume, motherboard

If all the software methods have been tried and the sound is still quiet, it's the hardware.

• 🔈 Talking speaker (wear of the membrane or break of contacts).
• 🔌 Dynamic plume (rub or oxidation).
• 📱 Audio codec on the motherboard (less often, but more critical).

How to check the speaker:

1. Call your phone from another device and listen: if the sound is distorted (wheezing, crackling) – the speaker is faulty.
2. Connect headphones: if they sound normal, and in the dynamics – quiet, the problem is localized.
3. Lightly press the speaker area during the call: if the sound changes, bad contact of the plume is to blame.

⚠️ Please note: Don’t try to disassemble the Redmi Note. 7 And in this model, the plume is very fragile, and it breaks easily when you're not done with it, if you're not experienced, and the cost of replacing the speaker in the service is from the very low-end. 800 before 1500 RUB, and repair of the ragged plume will cost in 2-3 more expensively.

6.Influence of covers, films and accessories

A common but common cause of silent sound is the wrong accessories.

• 📱 Thick cases with high sides can block the speaker hole.
• 🧲 Magnetic cases sometimes cause interference if the magnet is located near the speaker.
• 🔇 Protective glass with the wrong notch under the speaker (especially cheap Chinese models).

How to check:

1. Take off your case and call someone. If the sound gets better, the accessory is the problem.
2. Check whether the film closes the speaker hole (carefully tuck it with your nail).
3. If you use wireless headphones, turn them off – sometimes the phone automatically switches the sound to them.

Note the wallet cases (with a pocket for cards), the metal elements of the cards can shield the signal and degrade the quality of communication, which indirectly affects the volume of sound.

7 Network problems: how the operator affects sound

The sound quality of a call depends not only on the phone, but also on:

• 📶 Network signal level (with a weak signal, the voice may "cut»).
• 🔄 Type of connection (VoLTE usually sounds better than the other) 3G).
• 🌍 Roaming (some operators artificially turn the volume down in roaming).

How to improve sound:

1. Enable VoLTE in the settings SIM-maps (Settings) → SIM-maps and mobile networks → VoLTE challenge).
2. If the signal is weak, try switching to 2G (sometimes more stable than 4G in remote areas).
3. Call from the other phone to the same SIM-If the problem persists, the fault of the operator.

⚠️ Note: If you use a virtual carrier (e.g. Tinkoff Mobile or Yota), check if they have restrictions on call quality. MVNO They save on infrastructure, which affects the sound.

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If the problem with sound is only one SIM-The card, and the other is fine - the fault of the operator or herself. SIM (It's probably damaged).

8. when you can not do without a service center

If you’ve tried all the techniques in this article, but the sound in the Redmi Note 7 is still quiet, it’s time to contact the experts.

• 🔊 The speaker emits extraneous noise (crackling, squeaking) even at maximum volume.
• 📉 The sound disappears when the phone is heated (a sign of problems with soldered contacts).
• 💥 The phone fell or got wet before the problem appeared.
• 🔧 After disassembling the phone (for example, to replace the battery), the sound became worse.

Cost of repairs in service centers:

Before the service visit:

1. Back up your data (Settings → System and Device → Backup).
2. Make a video of the problem (so that the master understands what is wrong).
3. Check if the service has original parts for the Redmi Note 7.

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If the phone is warranty, don't take it apart yourself! Xiaomi will cancel the warranty when you see it on the autopsy. Contact the official service center with your check and box.

FAQ: Frequent questions about the sound in Redmi Note 7