How to block Viettel calls and messages: A comprehensive guide

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Ngày cập nhật gần nhất: 15/4/2026

If you're feeling harassed and exhausted by someone, this is the article you should check out. In this article, we will guide you on how to block Viettel calls and messages effectively.

If you are using Viettel and annoyed by numerous calls and messages, it can be quite frustrating. For Android and iPhone users, blocking messages or calls can be done through various apps. However, what if your phone doesn't have this feature? Check out how to block Viettel calls and messages here.

For iPhone users, blocking a phone number to avoid calls and messages is possible. Check out the steps on how to block calls on iPhone for detailed instructions.

How to Block Viettel Calls and Messages

Step 1: The first step involves registering for the service to block calls or messages beforehand.

To register for the message and call blocking service with Viettel, text: DK send 909 (7,000VND/month)

Activate message and call blocking: Text ONA or ON A to 909

Activate call blocking: ONC or ON C send 909

Activate message blocking: ONS or ON S send 909

Step 2: If you want to add a number to the block list, follow these steps.

Add phone number to block list: Them Phone1 Phone2 send 909

Step 3: If you want to unblock a previously blocked number, follow these steps.

Remove phone number from block list : Xoa Phone1 Phone2 send 909

If you want to remove all numbers, use the following syntax.

Remove all phone numbers from block list : XOATC or XOATC send 909

Step 4: If you want to view the blocked numbers, send the following message.

View blocked phone numbers : DSC send 909

Step 5: Finally, if you want to cancel the service, send the following message.

HUY send 909

Mytour has just introduced an effective way to block Viettel calls and messages. This solution is highly efficient because the network directly manages calls and texts to your number. Additionally, we provide guidance on blocking Viettel advertising messages and canceling Viettel advertising SMS. If interested, feel free to check it out.

Getting an advance is the solution that most students often use towards the end of the month. It is considered the most useful option for everyone in case the account is out of money and unable to top up the card. If you are using Viettel, check out how to get an advance on Viettel for more details.

Frequently Asked Questions

How can I effectively block calls and messages from Viettel?

To block Viettel calls and messages, register for the service by texting 'DK' to 909 for a fee. Then, use specific texts like 'ONA' for activation or 'Them Phone1 Phone2' to add numbers to your block list.

Is there a way to view the numbers I have blocked on Viettel?

Yes, you can view your blocked numbers by sending 'DSC' to 909. This will provide you with a list of all numbers currently blocked on your account.

How do I cancel the call and message blocking service with Viettel?

To cancel the call and message blocking service, simply text 'HUY' to 909. This will deactivate the service and remove all restrictions on incoming calls and messages.

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