Quiet sound during a call is one of the most annoying problems with modern smartphones. You put the device to your ear, strain your hearing, but you can still barely hear the other person. This situation can arise for various reasons: from simple contamination of the speaker grid to software failures or hardware malfunctions.
Fortunately, in the operating system Android there are many methods that allow you to enhance the sound during a conversation. In this article we will look at all the available options: from simple settings in the menu to the use of engineering codes and specialized software. Before taking your phone to a service center, you should try to solve the problem yourself.
It is important to understand that methods for increasing the volume may vary depending on the manufacturer of your device. Shell interfaces MIUI, One UI or ColorOS have their own characteristics, but the basic principles of working with sound remain the same for the entire ecosystem.
Basic sound settings during a call
The most obvious and often ignored way is to adjust the volume directly during a call. Many users forget that the volume buttons on the side of the smartphone control different types of sound depending on the context. If you press them on the desktop, the media or call volume changes, but not the voice call.
To increase the volume specifically for the interlocutor, you need to make a call (for example, to a friend or to support) and, holding the phone to your ear or turning on the speakerphone, press the volume up button. A slider with a handset icon will appear on the screen, which is solely responsible for voice channel. Move it to the maximum position.
It is also worth checking the basic sound settings in the device menu. Sometimes the sliders are knocked down by a software glitch or after a system update. Go to the Settings → Sound and vibration section and make sure that all parameters are set to an acceptable level. Some models have a separate "Pocket Volume" or similar features that may artificially lower the sound.
If the volume slider does not appear during a call, try pressing the power button once to wake up the screen, and immediately use the volume rocker.
⚠️ Attention: Do not confuse multimedia volume (video, music) with call volume. They are regulated by independent channels, and the maximum value of one does not guarantee a high level of the other.
Cleaning the speaker from dirt
Physical blocking of sound is the most common reason for a quiet conversation. The top speaker, located near the screen, is constantly in contact with the face, cosmetics, dust and moisture. Over time, the mesh holes become clogged, and the sound simply cannot pass out with sufficient force.
To clean, you will need a soft toothbrush, a dry microfiber cloth or a special adhesive tape (bla-tag). Never use sharp objects, needles or toothpicks - they can easily pierce the speaker membrane, which will lead to complete loss of sound. Gently brush along the mesh, sweeping away dust, and then wipe the surface.
There is a software cleaning method that is often used by owners of Xiaomi i Samsung. It consists of reproducing a low-frequency sound of a certain frequency, which causes the membrane to vibrate and push out dust. To do this, you can download special applications from the store Google Play or find relevant videos on YouTube.
- 🧹 Use a dry soft brush to remove visible dust from the mesh.
- 💨 Blow out the holes with compressed air (a can), holding it at a distance of 5-10 cm.
- 📱 Use the “Speaker Cleaning” function in the manufacturer’s proprietary utilities, if available.
☑️ Checklist for cleaning the speaker
Using the engineering menu to enhance sound
For advanced users for whom standard settings are not enough, there is access to the hidden engineering menu. This interface allows you to edit system parameters of the audio encoder and directly influence the signal amplification level. It is accessed through a set of special USSD codes in the “Phone” application.
The codes vary depending on the processor and manufacturer. For devices based on MediaTek the combination ##3646633##often works. For processors Qualcomm or pure Android may be suitable ##4636## or #0#. After entering the code, the service menu will open, where you need to find the section Hardware Testing or Audio.
Inside the audio section, find the tab Normal Mode (normal mode) and select Sph (Spheric - earpiece speaker). Here you will see the volume levels (Level 0-6). By increasing the values in the fields Max Vol, you increase the volume. Be extremely careful: setting the maximum values may result in wheezing or damage to the speaker.
Popular login codes:
##3646633## (MediaTek)
##4636## (Phone information)
#0# (Testing Samsung)What to do if the code does not work?
Many modern manufacturers (Huawei, new Xiaomi models) block access to the engineering menu through dialing. In this case, you will need special applications such as MTK Engineering Mode, installed via an APK file, or obtaining root access.
⚠️ Attention: Changing parameters in the engineering menu is done at your own peril and risk. Recording the current values before changing is mandatory so that you can return everything as it was if the quality of the connection deteriorates.
Third-party applications for amplifying audio
If the built-in tools do not help, applications from store Google Play. They work as software amplifiers, processing the audio stream in real time. The most popular solutions are Volume Control Plus, Super Sound and various equalizers with a booster function.
Such apps allow you to create a profile specifically for voice calls, ignoring music and video. They can add gain to a signal, making the other person's voice louder and clearer. However, it's worth remembering that software gain often introduces digital noise and distortion if you turn the slider too far.
Some applications require special permissions, such as “Change system settings” or access to the microphone. Please read the terms of use carefully. Free versions often contain advertising that can pop up at the wrong time, so for constant use it is better to consider paid versions without unnecessary visual noise.
| Application name | Amplification type | Presence of advertising | Setting complexity |
|---|---|---|---|
| Volume Control Plus | Software booster | Yes (in free) | Low |
| Super Sound | Equalizer + Amplifier | Minimum | Medium |
| Precise Volume | Fine-tuning steps | No (Pro version) | High |
| Speaker Booster | Bass and voice enhancement | Yes | Low |
Amplifier applications are only effective if the speaker is working properly. They will not be able to compensate for physical damage or complete clogging of the mesh with dust.
The influence of accessories and cases on sound
Sometimes the problem lies not in the phone itself, but in its “clothing”. Protective cases, especially thick silicone or leather models with high sides, can block the speaker opening. Even a slight displacement of the case after a fall can create an acoustic jam.
Try to remove the case and make a test call. If the sound has become noticeably louder and clearer, the cause has been found. In this case, it is recommended to either replace the accessory with a thinner model, or carefully cut a hole in the location of the speaker using a utility knife.
Also check the protective glass on the screen. Some low-quality glass has a solid black frame or incorrectly cut holes for the speaker and proximity sensor. Make sure that the speaker grill is completely open and nothing is blocking the passage of the sound wave.
- 📵 Remove the cover completely to check the purity of the sound.
- 👁️ Inspect the protective glass for blocking the top of the screen.
- 🔊 Check if the speaker hole is sealed stickers or film.
Hardware faults and repairs
If neither cleaning, nor settings, nor applications produce results, there is a high probability of hardware failure. The speaker is a consumable item that wears out over time. The membrane may lose its elasticity, peel off, or get microcracks from falling.
Another possible reason is oxidation of the contacts on the board after exposure to moisture. Even if the phone didn't sink, high humidity in the bathroom or in the rain could cause corrosion. In this case, professional cleaning of the board in an ultrasonic bath and inspection of the contacts under a microscope is necessary.
Replacing the speaker is an inexpensive and quick procedure. In most service centers it is completed in 30-60 minutes. Self-replacement is only possible if you have soldering skills and tools, since in modern smartphones the speaker is often soldered to the board or mounted with glue.
⚠️ Attention: If the phone has been dropped into water, do not try to dry it with a hairdryer or on a battery. High temperatures can melt the glue under the speaker and make the situation worse. It’s better to contact the service immediately.
Before going to the service, be sure to make a backup copy of your data. When diagnosing and repairing, the technician may require you to reset the settings to factory settings to eliminate software errors.
Frequently asked questions (FAQ)
Why did the sound become quieter after updating Android?
System updates sometimes reset user audio settings or change noise reduction algorithms, which can mistakenly muffle the voice interlocutor. Try resetting the sound settings in the menu or performing a complete reset of the phone (while saving the data) if the problem is critical.
Is it possible to increase the volume above 100% without root access?
No using standard system tools, the limit is set by the manufacturer to protect the speaker. However, third-party booster applications can programmatically amplify the signal, creating the effect of exceeding 100%, although the sound quality may deteriorate.
Does the telecom operator affect the call volume?
Indirectly - yes. If the signal quality is poor (1-2 network bars), the phone may go into power saving mode or use old voice compression codecs, which makes the sound quieter and muffled. Try to call in an area with reliable 4G/LTE reception.
What is the "Mono Audio" mode and how does it affect the call?
Mono audio mode combines stereo channels into one. In settings Special features this function is sometimes turned on accidentally. For an earpiece speaker this is not critical, but checking this parameter will not be superfluous when diagnosing sound problems.
Will resetting to factory settings help?
A reset will remove any installed applications that may conflict with audio drivers and return system audio settings to their original values. This is an effective method if the problem is caused by a software glitch, but will not help if the speaker is physically damaged.