The sudden disappearance of sound in a popular messenger Viber can seriously disrupt communication, especially if you are expecting an important call or urgent message. Users of devices based on Android often encounter a situation where incoming calls are silent, and notifications about new messages do not emit a single signal. This can be caused either by a simple failure in the system settings or by deeper software conflicts.
Before embarking on radical methods such as reinstalling the application or resetting the phone, it is necessary to conduct a thorough diagnosis of the current settings. In most cases, the problem lies in accidentally changed sound profiles or restrictions imposed by the energy saving system. Understanding the architecture of notifications in Android will help you quickly localize the source of the problem and fix it without losing data.
In this article we will analyze in detail all the possible reasons for the absence of audio signals and provide step-by-step guide for eliminating them. We will look at both standard configuration tools and hidden parameters available through the engineering menu or advanced application settings. Your task is to check each item sequentially in order to return full functionality to your messenger.
Diagnostics of basic volume settings and profiles
The first and most obvious step is to check the physical condition of the volume buttons and current software profiles. Often, users accidentally switch their smartphone to Silent or Vibrate mode by pressing buttons in their pocket or bag. Make sure the master volume slider is not at the far left. On many modern models Samsung or Xiaomi when you press the volume keys, an extended menu appears on the screen where you can separately adjust the levels for media, calls and notifications.
It is important to understand that in the system Android there is a separation of audio streams. The volume of media files does not always correlate with the volume of ringtones. You need to press the volume up button and then click on the settings icon (three dots or gear) that will appear in the pop-up panel. This will open the mixer where you can independently raise the level for the category Notifications and Call.
It's also worth checking to see if Do Not Disturb is activated. This feature blocks all audio signals except those added to exceptions. Go to Settings → Sound and vibration → Do not disturb and make sure the switch is turned off. If you need the mode for work, set up exceptions for contacts from favorites or for an application Viberso that important calls still go through.
⚠️ Attention: On some devices, the power saving mode may automatically mute the sound of notifications background applications to save battery power. Try disabling this mode temporarily to check.
Configuration of notifications inside the Viber application
If the system settings are in order, the problem may lie in the internal parameters of the messenger itself. Developers Viber provide flexible tools for customizing alerts, and a failure in one of them can lead to complete silence. Open the application, go to the More → Settings → Notificationssection. Here you will see the “Notification Sound” switch - make sure it is active.
Next you need to check the selection of a specific audio file for the notification. Sometimes after updating the system or the application itself, the path to the selected ringtone is lost, and the system cannot play the file. Click on the “Notification Sound” item and select any standard melody from the list provided to eliminate the possibility of a broken file. The same should be done for the settings for incoming calls in the section Calls → Ringtone.
The settings for individual chats deserve special attention. In Viber you can mute the sound for a specific conversation or group, and thisSetting overrides the general settings. Go to the problematic chat, click on the contact name or group name at the top of the screen and check the “Sound” option. If it's set to "None", change it to "Default" or select your own ringtone.
If you use different themes in Viber, try switching to the standard theme. Third-party themes sometimes contain errors in the paths to sound files.
Don't forget that in new versions Android (starting from 8.0 Oreo) notification channels are managed separately. Even if the sound is turned on in Viber itself, the system could mute a specific channel. Go to Phone settings → Applications → Viber → Notifications. You will see a list of categories: “Messages”, “Calls”, “Groups”. Click on each of them and make sure that the “Sound” switch is active and the correct signal is selected.
Manage permissions and microphone access
The correct operation of the audio stream in the messenger directly depends on the permissions issued. If an app doesn't have access to your microphone or audio system, audio may not play or may be interrupted. Go to the settings of your smartphone through the item Applications → Viber → Permissions. Here access to "Microphone", "Contacts" must be activated. data-i="77">"Notifications" and, what is critically important, "Notifications".
On some shells, such as MIUI ot Xiaomi or ColorOS ot Oppothere are additional levels of privacy protection. Check if there is a restriction on “Autorun” for Viber. If an app can't run its services in the background, it won't be able to trigger a sound when there's an incoming call. Allow auto-start and background work in the appropriate battery or application settings menu.
It is also worth checking whether access to the storage is blocked if you use custom ringtones saved in the phone's memory. Without read storage permission, the app will not be able to download the audio file you select. In the list of permissions, find the “Files and media” or “Memory” item and set the value to “Allow”.
| Resolution type | Default status | Impact on sound | Where to check |
|---|---|---|---|
| Microphone | Requested on the first call | Critical for voice messages and calls | Settings → Applications |
| Notifications | Allowed | Responsible for the ability to play a signal | Settings → Notifications |
| Background activity | Limited by the system | Affects the arrival of calls to sleep mode | Battery → Background restrictions |
| Memory access | Requested | Required for downloading custom ringtones | Settings → Applications |
☑️ Checking Viber permissions
Impact of third-party accessories and Bluetooth connections
Often the reason for the “loss” of sound is not a software failure, but the redirection of the audio stream to an external device. If your smartphone is connected to a Bluetoothheadset, speaker or car system, the sound will go there and not through the phone's speaker. Even if the device is in another room or turned off, but remains in the paired list, the phone may try to route audio to it.
Check the top notification shade: if the icon Bluetooth is active, try temporarily disabling this feature completely. Also go to Settings → Connected devices and unpair with devices that you are not currently using. This will eliminate the possibility of accidental switching of the audio stream.
Another reason may be contamination of the speaker or moisture ingress, which is important for models without complete moisture protection. Visually inspect the speaker grille. If dust has accumulated there, gently clean it with a soft brush. Sometimes a software failure of the audio driver can be cured by rebooting the device with the SIM card removed in order to reset the network settings that affect the communication profile.
⚠️ Attention: If you are using a USB-C to 3.5 mm adapter or wireless headphones, make sure they are working properly. A breakdown of the accessory may block sound output to the main speaker of the smartphone.
Resetting the cache and reinstalling the application
Accumulated temporary files (cache) can cause a conflict in the operation of audio playback modules. Clearing the cache is a safe procedure that will not delete your conversations, but will reset temporary application settings. Go to Settings → Applications → Viber → Storage and press the button Clear cache. Do not confuse this button with the “Clear data” function, which will delete the entire message history.
If clearing the cache did not help, the files of the application itself may be damaged. In this case, a complete reinstallation is required. Before doing this, be sure to create a backup copy of chats via Viber Settings → Account → Backupto save the chat history in Google Drive. After creating a backup, delete the application and download it again from the official store Google Play.
When setting up for the first time after reinstallation, carefully monitor the permission requests. The system may disable some features by default for “freshly installed” applications for security purposes. Manually confirm access to all necessary functions, especially the microphone and notifications, immediately after logging into your account.
What to do if the sound appears, but becomes quiet?
If after reinstallation the sound has become significantly quieter, check the “Absolute volume” settings in developer mode. Disable this option to decouple the volume control of your phone and Bluetooth devices.
System updates and version compatibility
Mismatch between the operating system version and the application version is a common cause of unstable operation. Developers Viber regularly release updates that optimize performance for new versions. Android. Go to Google Play Market, find Viber and check for the presence of the button Update. If it is active, be sure to install the new version.
It is also worth checking for updates for the smartphone system itself. Manufacturers often release patches to correct audio driver errors. Go to Settings → About phone → System update. Installing the latest security patches can resolve the conflict causing no sound.
However, if you are using a beta version of the system or custom firmware, the problem may be the instability of the OS itself. In such cases, the sound may disappear selectively. If the problem appeared immediately after updating the system, it makes sense to wait for the next patch or roll back to a stable firmware version, if possible.
Regular application and system updates are the best prevention of software conflicts that affect multimedia functions.
Radical measures: Resetting network and phone settings
If none none of the above methods brought results, the problem may lie in deep system network settings that affect the transmission of VoIP traffic. Try resetting your network settings. This action will delete saved Wi-Fi passwords and Bluetooth settings, but will return network settings to factory defaults. The path usually looks like this: Settings → System → Reset → Reset Wi-Fi, mobile data and Bluetooth settings.
As a last resort, when the problem is global in nature and affects not only Viberbut also other applications, you can consider completely resetting the device to factory settings. This will return the phone to "out of the box" condition. Be sure to make a complete backup of all important data before this procedure, as all information will be deleted.
After the reset, set up the phone as a new device without immediately restoring the system settings backup (data can be returned, but it is better to configure the system settings manually). Install Viber and check the sound. If it appears, it means that the problem was caused by some kind of system conflict or a third-party application that you will not install again.
⚠️ Attention: A full reset deletes all data from the internal memory. Make sure that your photos, contacts and files are saved on external media or in the cloud before starting the procedure.
Frequently asked questions (FAQ)
Why is there no sound in Viber, although other applications have it?
Most likely, the problem is localized within the settings of Viber itself application Viber or in the notification channel for this specific application in the system Android. Check to see if a ringtone file has been selected that has been deleted from the phone's memory, and make sure that Viber there is no background activity restriction set.
How do I get the sound back if I accidentally clicked "Mute" in a specific chat?
Go into the conversation where the sound is muted. Tap the person's name at the top of the screen. In the menu that opens, find the “Sound” item or the bell icon. Change the setting from None to On or select a specific ringtone. This action will only apply to this dialog.
Does power saving mode affect the sound of notifications?
Yes, aggressive power saving modes can “freeze” applications running in the background, causing notifications to arrive with a delay or without sound. Add Viber to the battery exceptions list or disable the power saving mode to check.
What should you do if the sound appears, but it is very quiet and intermittent?
This may indicate a hardware problem with the speaker or a conflict with Bluetooth codecs. Try turning off Bluetooth, clearing the speaker connector of dust and checking if the “Mono sound” mode is enabled in the system’s special features, which may reduce the overall volume.
Can an antivirus block sound in the messenger?
Some third-party antiviruses and “cleaners” may mistakenly classify the background activity of the messenger as suspicious and block it. Try temporarily disabling third-party antivirus and checking the sound. If the problem disappears, add Viber to the app white list.