Unable to change 11 digits to 10 digits on Zalo, My Viettel

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Ngày cập nhật gần nhất: 15/4/2026

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Unable to convert 11 digits to 10 digits on Zalo, My Viettel

In this article, we will explore the issue of unable to change 11 digits to 10 digits on Zalo, My Viettel, which prevents many users from updating their phone contacts with new prefixes on their devices.

With the Zalo and My Viettel applications, users now have the option to convert 11 digits to 10 digits. However, many users have encountered the problem of unable to change 11 digits to 10 digits on Zalo, My Viettel.

Unable to convert 11 digits to 10 digits on Zalo, My Viettel

To fix the issue of unable to change 11 digits to 10 digits on Zalo, My Viettel, Mytour.vn would like to share the following solutions:

=> For Zalo application

1. Update Zalo app to the latest version

This is a solution to fix the issue of unable to change 11 digits to 10 digits on your Zalo app because perhaps your Zalo app version Zalo is not the latest version and does not have the appropriate changes or updates for your device.

+ For Android devices: Download Zalo for Android.
+ For iPhone devices: Download Zalo for iPhone.

2. Grant app permissions

There have been many cases of encountering the issue of unable to change 11 digits to 10 digits on Zalo, due to users unintentionally forgetting and blocking Zalo app from accessing contacts on the device.

- How to do

Step 1 : Access the Settings app, in this app interface, we will select the Apps section.

Next, the system will display a list of installed apps, we will search for and select the Zalo item.

Step 2 : Then, in the Zalo app information interface, we will select the App permissions section. Here we will see that the Contacts feature is not activated. We will select reactivate the Contacts feature .

Step 3 : Once successfully activated, we return to the Zalo app, and perform the steps to convert 11 digits contacts to 10 digits on Zalo.

=> For My Viettel app

1. How to update My Viettel app to the latest version

Similar to the case of unable to change 11-digit numbers to 10-digit on Zalo as we discussed above, we will proceed to update the latest My Viettel app for Android, iPhone here:

+ For Android devices: Download My Viettel for Android.
+ For iPhone devices: Download My Viettel for iPhone.

2. Grant access to phone contacts

Once you successfully update the latest version of the My Viettel app, you can grant access to phone contacts as follows:

- Launch the My Viettel app for Android, iPhone latest version, on the first access to this new version, the system will prompt users to Allow access to phone contacts as shown below. And then proceed to change contacts using this app.

3. Re-grant access to phone contacts from My Viettel

Next, we will explore re-granting access to Phone Contacts unintentionally denied by this app as well as fixing the issue of unable to convert 11-digit numbers to 10-digit on My Viettel.

Step 1 : Access the Settings app, in this app interface, we will select the Apps section from this settings screen as shown below.

Step 2 : Then, we will search for and select the My Viettel app icon . We will select the App permissions section.

Here we will select activate Contacts feature as shown above to fix this situation.

Thus, we have just explored other solutions to fix the issue of unable to convert 11-digit numbers to 10-digit on Zalo, My Viettel. This is one of the latest applications supporting updating new contacts for your device.

https://Mytour.vn/unable-to-convert-11-digits-to-10-digits-on-zalo-my-viettel-23817n.aspx
Additionally, you can also consider and choose to use the leading new number conversion app that many people love called Number Conversion. This is an app that has been integrated for all Android, iPhone, or WinPhone devices you are using to update your contacts.

Frequently Asked Questions

What should I do if Zalo is unable to change 11 digits to 10 digits?

To fix the issue on Zalo, ensure you have the latest version of the app installed. You can update it for Android or iPhone devices through the app store. After that, make sure the app has permission to access your contacts.

How can I fix My Viettel if it is unable to change 11 digits to 10 digits?

First, update the My Viettel app to the latest version for your Android or iPhone device. If the issue persists, check the app's permissions to ensure it can access your phone's contacts. You may need to grant or re-grant access to contacts through your device settings.

What are the steps to update the Zalo app to fix the issue of changing 11 digits to 10 digits?

To update the Zalo app, go to your app store (Google Play or App Store) and download the latest version. Once updated, make sure that Zalo has permission to access your contacts in your device settings.

How do I enable Zalo to access my contacts for changing 11 digits to 10 digits?

Go to your device's settings, find the Apps section, select Zalo, and then go to App permissions. Ensure the Contacts feature is activated to allow Zalo to access and modify your phone contacts.

Can My Viettel update contacts and change 11 digits to 10 digits on both Android and iPhone?

Yes, My Viettel supports contact updates on both Android and iPhone devices. Make sure the app is updated to the latest version, and grant it permission to access your phone contacts through the settings.

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