How to increase the volume of the speaker on Xiaomi Redmi 7 during a call: all working methods

Xiaomi Redmi 7 is a popular budget smartphone, but many users face the problem of quiet sound during conversations. Even at maximum volume, it can be difficult to hear in noisy environments. The reasons can lie in both the software limitations of MIUI and the hardware features of the model. In this article, we will examine all the proven 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 the speaker (aka "top" or "audible") and the main speaker for media are different components. Sound amplification techniques for music or video won't work here. We'll focus on improving audibility during calls, including solutions for cases where the problem is caused by wear and tear on the hardware.

1. Checking basic volume settings

Before you resort to radical measures, make sure that the problem is not the elementary settings. On Redmi 7, the volume of the speaker is adjusted separately from other sound profiles.

Open the Phone app, dial the combination for a test call (e.g. ##4636### won't work, that's a myth!), and press the volume buttons on the sidebar during the conversation. The screen should have a scale that says "Speak volume" on it. If it's not, you're adjusting the media sound, not the microphone.

• 🔊 Separate adjustment: B MIUI Call and conversation volume are set independently. Check both scales in Settings → Sound.
• 📞 In-car mode: Activate this mode in the call settings – it automatically amplifies sound and suppresses noise.
• 🔇 Shutting down Quiet Mode: Sometimes users accidentally turn it on through the notification panel, which reduces the volume of all sounds.

⚠️ Attention: If the volume does not change after adjusting the buttons, this may indicate contamination of the speaker or damage to the plume. Before software manipulations, inspect the speaker hole for dust.

2.Use of the Engineering Menu (Secret Codes)

Redmi 7 supports hidden engineering menus where you can fine-tune your audio settings, and one of the most effective ways is to change the Volume value for a conversational speaker.

Enter the combination in the phone application:

##36446337##

This will open the Engineering Mode menu (if the code didn't work, try ##4636## → Hardware Testing → Audio).

1. Select Hardware Testing → Audio → LoudSpeaker Mode.
2. In the Type section, specify Sph (Speak Speaker).
3. In the Value field, increase the current value by 10-20 units (maximum 160, but do not exceed 140 to avoid distortion).
4. Press Set and restart the phone.

Backup your data |Write down the initial settings |Battery charge > 50% |Do not interrupt the setup process-->

If the sound has become hoarse or has been disturbed, return the original values, and note that some MIUI firmware may have blocked access to the engineering menu.

3. Sound amplification applications

If standard methods don't work, you can use third-party utilities that are designed to capture and amplify the sound stream software.

Check reviews before installing – some apps may conflict with MIUI 10/11 on Redmi 7. Also note that artificial audio amplification reduces the speaker’s life.

Volume Booster|Sound Amplifier|Precise Volume|Other|I haven't tried.-->

4. Cleaning the speaker and checking hardware problems

Often, the cause of silent sound is contamination of the speaker or damage to the contacts. On the Redmi 7, the speaker is located at the top of the screen - its hole can be clogged with dust, fibers from the pocket or cosmetics.

For cleaning:

• 🧹 Use a soft brush (for example, for makeup) or compressed air (a balloon!
• 💧 In case of severe contamination, gently wipe the area around the speaker with a cotton swab dipped in isopropyl alcohol (not ethanol!).
• 🔧 If the sound is completely gone, check the speaker plume – on Redmi 7 it often departs when falling.

⚠️ Warning: If the sound is still quieter or cracks after cleaning, it may mean damage to the speaker membrane. ~500–800 ₽ service-centre).

5. Update firmware and reset settings

Sometimes a quiet sound during conversations is a firmware bug. Xiaomi regularly releases updates for Redmi 7, where similar issues are fixed. MIUI:

1. Go to Settings → About the phone → System update.
2. If you have a new version, install it (preferably via Wi-Fi).
3. After the update, reset the sound settings: Settings → Applications → Application Management → Phone → Storage → Clear the data.

If the problem has occurred after the update, try to roll back to the previous version via Fastboot or Recovery. Instructions for Redmi 7 are available on the 4PDA forum.

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Before resetting your settings, export contacts and SMS – they are stored in your phone’s memory and will be deleted.

6. Alternative solutions: headset and external speakers

If the software and hardware methods didn’t help, consider alternative ways to talk:

• 🎧 Wired headset: Even cheap headphones with a microphone will provide better audibility than the built-in speaker.
• 📶 Bluetooth headset: Optimal for drivers. Redmi 7 supports Bluetooth 4.2 - enough for stable communication.
• 🔊 External speaker: Connect your phone to a portable speaker via Bluetooth or 3.5mm connector (if it is serviceable).
• 📱 Loud communication: Turn it on with a button during the call, but note that the microphone will pick up the surrounding noise.

For owners of Redmi 7 with a faulty 3.5 mm connector is suitable USB-C headphone adapter (cost) ~300 ₽). The main thing is to choose adapters with support. OMTP-The standard used in Xiaomi.

Extreme measures: firmware modification

If you're willing to take risks, you can change the system files that control sound, a method that requires an unlocked bootloader and custom recovery (such as TWRP).

Instructions for experienced users:

1. Download the modified file mixer_paths.xml for Redmi 7 (look XDA Developers).
2. mount /system partition through TWRP and replace the original file in /system/vendor/etc folder.
3. Change the access rights to 644 (rw-r----).
4. Reboot the phone.

⚠️ Attention: Incorrect modification of system files can lead to a "brick" of the device (complete failure.

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Before modifying the firmware, create a full backup via TWRP – this will allow you to restore the phone in the event of a failure.

FAQ: Frequent questions about the sound on Redmi 7