In today's advancing world of internet-based service technologies, more and more people opt for communication through messaging and free call apps like Zalo rather than traditional methods. However, these apps occasionally cause inconvenience to users due to annoying notification errors.
Are you facing difficulties and frustrations because Zalo calls are not accompanied by notifications, causing you to miss important conversations and vital information? Let's explore the reasons and address them with 5 highly effective methods compiled by Mytour in this article!

Causes of Zalo Call Notification Not Being Received on Devices
In these situations, even though there is an incoming Zalo call, you won't receive any notification or sign on your phone.

Here are the 4 most common reasons that Zalo app users encounter when their devices have notification issues with Zalo calls:
- Disturbance-Free Mode Activated: This feature allows you to block all notifications from various sources. This means not only calls and messages from the Zalo app but also regular calls face a similar situation.
- Zalo App Not Granted Notification Permission: Without enabling notification permission for Zalo, you won't receive any notifications from the app, including messages, calls, and log alerts...
- Device in Software Conflict: This situation rarely occurs to the extent of causing notification errors, but in some cases, your beloved device might face this issue.
- Zalo App Error: Throughout the app development process, minor glitches often occur. However, developers usually address these issues in the latest updates.
How to Fix Zalo Call Notification Not Received on Device
Turn Off and Restart the Device
For Android Devices
You can completely power off and quickly restart by holding the physical power button on the side of the device (the power button may be located on the left, right, or top of the device, depending on the design).

For iOS Devices
Method 1: You can completely power off and quickly restart by holding the physical power button along with the volume button on the side of the device for a few seconds.

Method 2: In addition to the traditional power-off method using the physical button, you can also access the General Settings in the Settings app on the device >> scroll down to the bottom of the interface and select Shut Down.

Finally, you slide the slider from left to right to power off the device.

For Android Devices
Swipe down the upper right corner of the screen to open the control center (for earlier Android generations, swipe down the screen from the top). Then, in the Do Not Disturb function with the crescent moon icon, tap on it to turn off this feature (The icon not lit means the function was previously turned off).

For iOS Devices
Swipe down the upper right corner of the screen to open the control center (for earlier iOS generations, swipe up from the bottom of the screen). Then, in the Focus Do Not Disturb Mode with the crescent moon icon, tap on it to turn off this feature (The icon not lit means the function was previously turned off).

Grant Notification Permission for Zalo App
For Android Devices
Step 1: Access the Settings app on your device and select Notifications & Control Center (on some devices, this may be under Apps).

Step 2: Here, go to App Notifications and search for the app 'Zalo'.

Step 3: Lastly, slide the slider to the right to grant notification permission for the Zalo app.

For iOS Devices
Step 1: Access the Settings app on your device.

Step 2: In the Settings window, scroll down near the bottom of the page to access the Zalo app.

Step 3: Finally, go to the Notifications section and slide the slider to the right in the Allow Notifications part to grant notification permission for the Zalo app.

Update or Reinstall the App
Infrequent checks and updates of new app versions can lead to certain errors. Additionally, in the latest version, app developers will address most issues from previous versions to enhance the user experience. Therefore, it's advisable to regularly update the latest versions of your apps.

After updating to the latest app version, if the issue persists, try uninstalling the app and then reinstalling it. However, consider this action carefully as it means deleting all conversations on Zalo. So, be sure to backup and restore before proceeding with this step.
For Android devices, update to the latest version or reinstall the app here.
For iOS devices, update to the latest version or reinstall the app here.
Backup and Restore Device Factory Settings
Don't worry too much because, in typical cases, most Zalo notification issues will be resolved through the above 4 methods. However, in some particularly challenging situations, consider restoring the device's factory settings. Each mobile device has different factory reset procedures.

However, restoring the factory settings for this device should be carefully considered as it implies deleting all information and data on the device. Therefore, you need to pay attention to backup and restore issues before performing this operation to avoid data loss.
Conclusion:
Here are 5 effective ways to fix Zalo call notification issues on your device, compiled by Mytour. If you know of any other solutions, feel free to share with everyone by leaving a comment below. Hope this article is helpful to you. Wish you success.
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