Increasing the volume of the speaker on Xiaomi through the engineering menu: the full guide

Weak sound during calls is one of the most common problems for owners of Xiaomi smartphones, especially in the low-end models of the Redmi and POCO line. The manufacturer often lowers the volume of the conversational speaker for safety (to avoid distortion or damage to the membrane), but for many users this creates discomfort. Fortunately, you can fix the situation without root rights and complex manipulations - just use the hidden engineering menu (Engineer Mode), where the advanced settings of the audio system are hidden.

But it's important to understand that changing factory settings is fraught with risks. Incorrect readings can lead to wheezing, distortion, or even physical breakdown of the speaker. In this article, we'll look at the safe limits of volume increase, the current codes for calling the engineering menu on different firmwares (MIUI 12/13/14, HyperOS), and alternative ways to improve audibility without risk to the device. If you're willing to experiment, let's get started.

What is an engineering menu and why is it hidden from the user

The Engineering Menu (Engineer Mode or MTK Engineer Mode) is an Android service section designed to test the hardware components of a smartphone.It is available on all Xiaomi devices, but is hidden from ordinary users for several reasons:

First, low-level settings are concentrated, which, without understanding the consequences, can disrupt the stability of the phone, such as miscalibration of the microphone or the speaker can cause them to fail, and second, manufacturers restrict access to these settings to comply with safety regulations (for example, the maximum volume levels in the EU).

On Xiaomi smartphones, the engineering menu is implemented through Qualcomm or MediaTek chipsets, so the interface and available options may differ. For example, on devices with a Snapdragon processor (for example, Xiaomi 12 Pro or POCO F4), the menu is called Qualcomm Service Menu, and on MediaTek (Redmi Note 11, POCO M5) – MTK Engineer Mode. This is important to consider when choosing the code to log in.

⚠️ Note: In some regions (e.g. EU countries), manufacturers block the ability to change volume through the engineering menu at the software level. If after entering the code, the Audio partition is missing or the parameters are blocked, this means that your firmware has regional restrictions.

Preparation: Check the MIUI model and version before entering Engineer Mode

Before you start settings, you need to make sure that your device supports access to the engineering menu.

• 📱 Find out the exact model of the smartphone: go to Settings → The phone. → The Redmi Note 10 Pro has a sweet index, and POCO X3 Pro — vayu.
• 🔢 Check the version. MIUI: In the same section About the phone, find the line Version MIUI. Up-to-date firmware (e.g, MIUI 14 or HyperOS may require other access codes.
• 🔋 Charge your phone at least 50%. Interrupting the setup process (for example, due to battery discharge) can cause crashes.
• 📡 Make sure that SIM-Some of the codes in the engineering menu require a network.

If your Xiaomi is purchased in China (CN firmware), the European Union (EEA) or India (IN), the options available in the engineering menu may vary, for example, European versions often block the change in loudspeaker volume due to the strict EN 50332-2 (hearing safety standard).

🔍 How do you determine the firmware region? Go to Settings → The phone. → All specifications → Version. MIUI. The end of the line will be a region (e.g, 14.0.5.0.TKHCNXM, where CN — China).

Find out the model of the smartphone|Verification of the version MIUI|Battery charge ≥50%|Active. SIM-map|Identify the firmware region

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Codes for entering the engineering menu on Xiaomi (current for 2026)

The way you call the engineering menu depends on the processor and the version of MIUI. Below are the working codes for most Xiaomi, Redmi and POCO models:

📌 How do you type? Open the standard Phone app, go to the Keyboard tab and type in the combination:

1. Try typing it without a character at the beginning (e.g. #4636##).
2. Remove spaces if they appear during copying.
3. Reboot your phone and try again.

⚠️ Note: Some models (e.g. Xiaomi) 13T Pro with HyperOS) the engineering menu can be blocked, in which case, when you enter the code, the message "Connection problem or invalid" will appear. MMI code" This means that the manufacturer has restricted access to service functions.

Step-by-step: how to increase the volume of the speaker

After successfully logging into the engineering menu, follow this instruction: Setting the Sip Voice Call or Voice Call Volume setting above 160 can cause audio distortion or damage to the speaker. The recommended safe range is 140 to 155.

🔧 Step 1. Go to the Audio Settings section

• In the engineering menu, select Hardware Testing (or MTK Settings for MediaTek).
• Next, go to Audio. → Normal Mode.
• In the test list, find Sip Voice Call (for calls) or Speaker (for polyphonic speakers).

🔧 Step 2: Adjust the volume level

• In the Value (or Level) field, you will see the current value (usually 0 to 160).
• Increase the value by 10-15 units (for example, from 140 to 150).
• Press Set or Apply to save.

🔧 Step 3: Testing and adjustment

• Call another phone and check the sound. If you have wheezing, reduce the value by 5 units.
• Repeat the test at different levels until you find the best balance between volume and quality.

⚠️ Note: Some models (e.g. Redmi Note 12 Pro)+) If you change the parameters in the engineering menu, you need to restart. If the volume does not change immediately, turn off and turn on the phone.

💡

Before you change the volume, write down the factory values of Sip Voice Call and Speaker on paper, which will help you to return the settings back if the sound gets worse.

Alternative ways to improve volume without an engineering menu

If the engineering menu is not available or you do not risk changing the settings manually, use these methods:

• 🔊 Settings of uniformity of sound: B MIUI Go to Settings. → Sound. → Sound uniformity and turn on the option, which will amplify the low frequencies by making the voice of the person speaking clearer.
• 📱 Sound amplification apps: Install Volume Booster or Sound Amplifier from Google Play. They work on top of system settings and do not require root.
• 🔋 Clean speaker: Sometimes a weak sound is caused by clogging of the speaker grille. Carefully clean it with a soft brush or compressed air.
• 🔄 Resetting sound settings: In Settings → Annexes → Application management → All applications, find the phone, clear the cache and the data, and that will bring back factory call parameters.

💡 Advice for owners POCO: In some models (for example, POCO X5 Pro) there is a hidden Dolby Atmos option for calls:

1. Install Dolby Atmos from the MIUI App Store.
2. In the sound settings, select the Music or Movie profile.
3. Enable the Call Option (if available).

⚠️ Attention: Sound amplifiers (such as Volume Booster) can increase the CPU load and reduce battery life. Use them only when necessary.

💡

Changing the volume through the engineering menu is the most efficient way, but it requires caution. Alternative methods (applications, setting the uniformity) are safer, but give a smaller increase in volume.

Frequent Mistakes and How to Avoid Them

When working with the engineering menu, users often make critical errors that lead to sound degradation or system failures, the most common of which are:

• 🔊 Too high volume: Setting Sip Voice Call above 160 almost always causes distortions. Optimal range is 140-155.
• 🔄 Change the wrong settings: Don’t confuse Sip Voice Call with Media Volume or Ring Volume).
• 📵 Ignoring regional restrictions: On firmware EEA (Europe) or IN (India) some parameters are blocked. Trying to change them may result in resetting.
• 🔋 Lack of testing: Always check the sound after changes! wheezing or interrupting the voice means the value is too high.

🛠️ How do you get back to the factory settings? If the sound gets worse after the change:

1. Return to the engineering menu and reset the Sip Voice Call value to the standard (usually 140-145).
2. If the menu is not available, reset the sound settings through Settings → Apps → Phone → Clear the data.
3. In extreme cases, make a complete reset of your phone (but it will delete all the data!).

📊 Table of safe values for popular models:

When to not increase the volume through the engineering menu

Despite the obvious benefits, there are situations where changing the Engineer Mode settings can do more harm than good:

• 🩺 Speaker problems: If the sound is already distorted (wheezing, crackling), increasing the volume will aggravate the breakdown.
• 📉 Old smartphone model: On devices older than 2019 (e.g. Redmi 6 or Mi) A2) speakers are often worn out, and increasing the volume will lead to their failure.
• 🔒 Blocked firmware: On some corporate or carrier versions of Xiaomi (e.g., from MegaFon or Beeline), the engineering menu can be disabled at the kernel level.
• 🛡️ Warranty repair: If the phone is warranty, changing service parameters can cause denial of service.

🔍 How do you check the status of the speaker? Call another phone and listen:

• If the voice of the interlocutor sounds muffled, but without distortion, you can try to increase the volume.
• If you hear wheezing, cracking or interruptions, the speaker is faulty and a replacement is required.

⚠️ Note: Some models (e.g. Xiaomi) 12S Ultra, a conversational speaker combined with multimedia, and increasing the volume of calls can affect the sound of music and video, making it too loud or distorted.

FAQ: Answers to Frequent Questions