Xiaomi Redmi 7 is one of the brand’s most popular budget smartphones, but many users experience a quiet sound while making calls, a problem that is especially relevant in noisy places or when using a device on the street. In this article, we will examine all possible ways to increase the volume of a conversational speaker, from standard settings to hidden functions of the engineering menu.
It's important to understand that volume limits are often set by the manufacturer to protect the speakers from overload. However, in most cases they can be bypassed without harming the device. We'll look at both software methods (via Android and MIUI settings) and technical methods (cleaning the speaker, checking contacts).
If you're not sure about your skills, start with the simplest ways and move on to the hardest ones only when needed. Some methods require root rights or installing additional software, which can affect the warranty. At the end of the article, you'll find an FAQ with answers to frequent questions and warnings about possible risks.
1. Check basic sound settings on Redmi 7
Before you start complex manipulations, make sure that the problem is not in the standard settings. On the Xiaomi Redmi 7, there are several parameters that can affect the volume of the speaker:
- 🔊 Call volume level: check if the slider is set to a minimum. During the call, press volume buttons and select Call mode".
- 📞 In Phone Mode: Sometimes the smartphone automatically switches to speaker or Bluetooth. Make sure you select In Phone Mode (Tube icon).
- 🚫 Do not interfere: Turn off the "Do Not Disturb" mode in the notification curtain or in Settings → Sound.
- 🔄 Adaptive sound: in MIUI There's a function that automatically adjusts volume. Turn it off in Settings. → Special opportunities → Adaptive sound.
Also, check if the mono-sound mode is activated (for people with hearing impairments). It can turn down the overall volume. Find this setting in Settings → Special. capabilities → Hearing. If nothing helps, move to the next section.
2. Cleaning dynamics and checking hardware problems
Often the silent sound is not caused by software settings, but by physical contamination. The Redmi 7 speaker is located at the top of the device (near the front camera) and can be clogged with dust, villi or toe fat deposits. Here's how to fix this:
- Visual inspection: Hold your smartphone to the light source and check if there is any visible contamination in the speaker grille. Use a magnifying glass if necessary.
- Soft brushing: Take a soft bristles toothbrush or a special electronics brush, walk gently through the speaker grille without pressing hard.
- Compressed air purging: If you have a can of compressed air (to clean keyboards), blow the speaker with short pulses. Keep the balloon vertical to avoid fluid.
- Fill check: over time, the speaker's protective mesh may move away. If you notice this, gently glue it back with double-sided tape (do not use glue!).
A critical mistake many users make is using sharp objects (toothpicks, needles) to clean. This almost always causes damage to the speaker membrane and complete loss of sound. If the volume hasn't changed after cleaning, the problem may be the speaker's contacts or connecting it to the motherboard, in which case you need to disassemble the device - you should contact the service center.
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After cleaning the speaker, check its work using the test: type USSD-code ##4636## → Select "Phone Information" → "Checking the speaker. This will help make sure that the problem is in the hardware.
3.Use of engineering menu to increase volume
The engineering menu is a hidden part of Xiaomi's firmware, where you can adjust sound settings that are not available in the standard interface. This method does not require root rights, but requires caution: improper changes can lead to failures.
- Open the Phone app and enter the code: ##36446337## Once entered, you will automatically be taken to the engineering menu (if the code does not work, try the alternative: ##4636## → Phone Information → Test Menu).
- Go to the Hardware Testing → Audio section.
- Select LoudSpeaker Mode (or Normal Mode if the first one is not available).
- In the Type field, specify Sph (this denotes a conversational speaker).
- In the Value bar, you will see the current volume value (usually 0 to 255). By default, it is often 160-180. Smoothly increase it to 200-220 (don’t maximize immediately!).
- Press Set, then Save and restart the phone.
After the reboot, check the volume during the call. If the sound is better, the problem is solved. If there are wheezing or distortion, return the value 10-15 units lower. Warning: values above 230 can overload the speaker and its failure!
What to do if the engineering menu is not opened?
4. Apps to amplify sound: top-3 decision
If standard methods don't work, you can use third-party applications, which work on two principles: either programmatically amplify the sound (through uniform amplitude increase), or adjust the equalizer. It's important to choose proven utilities to avoid running into viruses. We tested the three most effective ones:
| Annex | Principle of work | Pluses | Cons | Reference |
|---|---|---|---|---|
| Volume Booster | Increases volume by changing system parameters | Simple interface, works without root | Can distort the sound at maximum | Download |
| Equalizer FX | Adjusts frequencies through the equalizer | Thin tuning under voices, supports presets | Requires adjustments, not all frequencies are amplified the same way | Download |
| SoundAbout | Redirects sound between speakers | Can use the main speaker for calls | A complex interface, not always stable | Download |
Before installing any application:
- 🔒 Check the reviews and rankings on Google Play (should be 4)+ star 100K+ installation).
- 📥 Download only from the official store - there is no guarantee of security APK third-party.
- 🔄 Once installed, restart your phone so that the changes take effect.
Note: Apps like Volume Booster may conflict with MIUI system settings. If sound artifacts (cracking, echoing) appear after installation, uninstall the program and return the settings to factory settings.
Check the current volume in the settings
Download the app only from Google Play
Read the Developer's Instructions
Make a backup copy of the sound settings
Prepare to restart the device-->
5. Root methods: maximum amplification of sound (for experienced)
If you're willing to sacrifice a warranty and you're experienced with root rights, you can try advanced user methods, which give you the biggest volume boost, but also the risks are higher.
Method 1: File editing mixer_paths.xml
This file contains the settings of Android audio profiles to change it:
- Get root access (for example, through Magisk).
- Install a file manager with root support (such as Root Explorer).
- Cross the path. /system/vendor/etc/ and find the file. mixer_paths.xml.
- Make a backup copy of it (copy it on the backup) SD-map).
- Open the file in the text editor and find the lines with the parameters: <path name="handset-mic"> <ctl name="RX1 Digital Volume" value="84" /> Increase the value by 10-15 units (for example, from 84 to 95).
- Save the file, return the original rights (644) and restart the phone.
Method 2: Installation of a custom core
Some custom cores (e.g., FrancoKernel or ElementalX) have built-in settings to amplify sound.
- Unlock the Xiaomi Redmi 7 bootloader (instructions on the official website).
- Install custom recovery (such as TWRP).
- Download a compatible kernel for your model (check out the XDA forum).
- Sweak the kernel through recovery and find the Sound Control section in its settings.
⚠️ Attention: improper editing of system files can lead to bootloop or break the speaker. If you are not sure about your abilities, contact a specialist. Also remember that after obtaining root, you will lose the ability to update "over the air" (OTA).
6. Alternative solutions: headphones, Bluetooth, external speakers
If all attempts to amplify the sound have failed, consider alternative ways to make calls:
- 🎧 Wired headphones with a microphone: even the cheapest headsets often give better sound than the built-in speaker. Any with a 3.5 mm connector or a jack will do. USB-C (adapter-wise).
- 🔊 Bluetooth headset: modern models (for example, Xiaomi Mi True Wireless Earbuds) support noise reduction and amplify the voice of the interlocutor.
- 📱 Speaker mode: during the call, click on the speaker icon in the call interface. the sound will go through the main speaker (but this is inconvenient in public places).
- 🔌 Outside USB-speaker: if you have an adapter USB-C → 3.5 mm, you can connect a portable speaker (for example, Xiaomi Mi Portable Speaker).
For Redmi 7 owners, there is another life hack: if you make frequent calls in noisy places, turn on the voice enhancement option in your call settings (located in Settings → Sound → Call Quality), which suppresses background noise by making your voice clearer, but does not increase the volume directly.
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If the silent sound came after the MIUI update, try rolling back to the previous firmware version. Often, the sound bugs are fixed in the next patches.