How to turn up the volume of a speaker on Xiaomi through the engineering menu: safe ways and hidden settings

A quiet conversational speaker on Xiaomi smartphones is a common problem, especially on budget Redmi models and the like. POCO. The manufacturer often lowers the volume for safety (to avoid distortion of the sound), but for many users this becomes a serious inconvenience. MIUI Limited, and third-party applications require root rights or are unstable.

The solution lies in the hidden engineering menu (Engineer Mode), where you can manually adjust the parameters of the audio chip. However, this method requires caution: the wrong settings can lead to overloading of the speaker, distortion of sound or even hardware breakdowns. In this article, detailed instructions explaining which parameters are responsible for the volume, how to change them without risk, as well as alternative ways to amplify the sound.

We warn you right away: changing the settings in the engineering menu deprives you of warranties (if the device is warranty) and can disrupt the audio system. If you are not sure about your actions, use the safe methods in the last section of the article.

What is an engineering menu and why is it hidden?

The Engineering Menu (Engineer Mode or Service Menu) is an Android service section designed to test and calibrate hardware components, and Xiaomi has it based on Qualcomm chips (access code ##4636##) or Mediatek (code #36446337###).

✅ Protection against accidental changes: Incorrect settings can disable communication modules, camera or speakers.

✅ Compliance with certification standards: loudness of speakers is regulated by regulations (e.g, EU Volume Limit, and exceeding the limits may deprive the device of the certificate.

✅ Preventing hardware breakdowns: The volume increase above the calculated values causes the speaker coil to overheat and degrade.

You can change not only the volume, but also the frequency response of the sound, the balance between the speakers, and also calibrate the microphone. However, for a conversational speaker (earpiece), not all parameters are available - this is most often limited to the adjustment of gain (gain).

How to open the engineering menu on Xiaomi: step-by-step instructions

The way you log in depends on your smartphone's processor. You can find out the chipset model in the Settings app. → The phone. → Full specification (Paragraph Processor).

For most modern Xiaomi models (2019-2026), the following codes are suitable:

• 🔹 Qualcomm Snapdragon (Redmi Note 10/11, POCO X3/X4, Mi 11/12): enter in the call app ##4636## → Choose Hardware Testing → Audio.
• 🔹 Mediatek Helio/Dimensity (Redmi 9/10, POCO M3/M4): use the code ##36446337## or ##8255## → Go to the Hardware Test.
• 🔹 Older models (until 2018): try ##3644633## or ##7363##.

If the code doesn't work, check:

1. No spaces or extra symbols when entering.
2. Network connection (on some firmware, the menu is blocked without the Internet).
3. Version MIUI: on Chinese firmware (China) ROM) codes may differ.

Make sure that the battery is >50%

Backup of important data

Record the current sound settings (photo/video)

Use headphones to test for changes-->

⚠️ Note: Some Xiaomi models (e.g. Redmi Note 12 Pro)+) The engineered menu may be blocked by the manufacturer, in which case the attempt to enter the code will result in a message "Connection problem or invalid". MMI It is impossible to bypass the block without root rights.

Search and change the volume parameters of the conversational speaker

After you log into the engineering menu, you need to find the section responsible for audio settings. The menu interface varies depending on the version. MIUI and the processor, but the general logic is as follows:

1. From the Hardware Testing menu, select Audio (or Audio Testing).

2. Next, go to the LoudSpeaker Mode submenus or Normal Mode (for a conversational speaker).

3. Find the parameters with the names:

- Speaker Gain (Dynamic amplification),

Earpiece Volume (volume of speaker)

Voice Call Volume (volume during calls)

🔧 Key parameters for adjustment:

⚠️ Warning: Changing the Mic Gain settings can cause your voice to sound distorted to the other person. The optimal value is no more than 3 for most Xiaomi models.

After changing the values, be sure to test the speaker:

1. Call another phone and check the sound quality.
2. Turn on the voice recording and listen to it at maximum volume.
3. If there are wheezing or distortion, return the parameters to the original.

💡

If the speaker is quieter than it was after the changes, reset the engineering menu settings via ##4636## → Reset All.

Xiaomi models that work (and don’t work)

Successful configuration depends on the processor and version MIUI. Below is the compatibility table for popular models:

✅ It works consistently (confirmed by users):

• 📱 Redmi Note 10/10 Pro/10S (Snapdragon 678/732G)
• 📱 POCO X3 Pro (Snapdragon 860)
• 📱 Mi 10T/10T Pro (Snapdragon 865)
• 📱 Redmi 9/9A/9C (Mediatek Helio G35/G80)

❌ Not working or blocked:

• 🚫 Xiaomi 13/13 Pro (blocking the engineering menu on Chinese firmware)
• 🚫 POCO F4/F5 (limited access to audio settings)
• 🚫 Redmi Note 12 5G (Root is required to unlock)

🔍 How to know if your model is supported?

1. Try entering the engineering menu code.
2. If the menu opens but there is no Audio partition, the audio chip is blocked.
3. Check on the forums (for example, 4PDA XDA-Developers reviews for your model.

Risks and consequences of incorrect settings

Increasing the volume of a speaker through an engineering menu is an interference with the hardware configuration, and the consequences can be both temporary and irreversible:

🔴 Short-term challenges:

• 🔊 Distortion of sound (wheezing, crackling) at high volume.
• 📞 Echo in the tube – the interlocutor hears his voice with a delay.
• 🔇 Self-involved volume reduction (MIUI Resets settings after rebooting).

🔴 Long-term risks:

• 🔥 Burnout speaker - if the permissible current is exceeded, the coil can fail.
• 📉 Sound degradation – over time, the speaker begins to “wheez” even at low volume.
• 🚨 Loss of warranty – if the service center detects changes in the engineering menu, repairs may be refused under warranty.

🛠 How to minimize risks?

1. Do not increase Speaker Gain by more than 20% of the original value.
2. After the changes, check the speaker for overheating (hold the phone to your ear for 5-10 minutes).
3. Use audio testing apps (like Google Play’s Speaker Test).

💡

If after the changes the speaker began to warm or make extraneous sounds - immediately return the settings to the factory and do not use the method again.

Alternative ways to increase volume without an engineering menu

If the engineering menu is not available or you don’t want to take risks, use safe methods:

🔧 1. Settings MIUI (formal)

• 📱 Go to Settings. → Sound and vibration → Loudness.
• 🔊 Turn off the "Safe Volume" option (if available).
• 🎧 Turn on "Amprovement of sound in headphones" (works for the speaker on some models).

🔧 2. applications for amplification of sound (without root)

• 🔊 Volume Booster – Increases volume by 20–30% through software processing.
• 🎛 Equalizer & Bass Booster – allows you to adjust the equalizer to improve voice audibility.
• 📞 Sound Amplifier (from Google) – amplifies the sound during calls.

🔧 Hardware solutions

• 🔇 Use a Bluetooth headphone with support LC3 codec (e.g. Xiaomi Buds 4) – the sound will be clearer.
• 📱 Stick a resonator (for example, from the Redmi Note 8 Pro) to the speaker – this will increase the sound by 10-15%.
• 🔧 Replace the speaker with a more powerful one (for example, with AliExpress for your model).

⚠️ Attention: Sound amplification applications can increase the load on the processor and drain the battery faster. MIUI.

Frequent Mistakes and How to Avoid Them

Users often encounter problems when trying to turn up the volume, and here are the most common errors and their solutions:

🔴 Error 1: The engineering menu will not open

• 📱 Reason: Code entered incorrectly or blocked by firmware.
• 🔧 Solution: Try alternative codes (#1575## for Mediatek). If it doesn't work, root is required.

🔴 Mistake 2: After the changes, the sound was completely lost.

• 📱 Reason: Speaker Gain is too high (e.g. 255).
• 🔧 Solution: Reset your settings via ##4636## → Reset Audio.

🔴 Error 3: The sound is hoarse at maximum volume

• 📱 Reason: Exceeded the limit on the current for the speaker.
• 🔧 Solution: Reduce Earpiece Volume by 1-2 points and check again.

🔴 Error 4: Settings are reset after rebooting

• 📱 Reason: MIUI Automatically restores factory parameters.
• 🔧 Solution: Use the Tasker app to automatically apply settings after turning on.

If neither method worked, the problem is probably the hardware malfunction of the speaker, and then the replacement will help.

FAQ: Answers to Frequent Questions