Custom SMS Sender Tutorial: Sending Personalized Messages at Scale

Custom SMS is a feature through which you can send messages to many people at one time by changing some fields such as the name of the receiver, mobile number, or other details. The content other than these fields will remain the same for all recipients.

You can follow the below-mentioned steps to send a custom SMS:

1. Create an Excel Sheet with the first row reserved for the heading of the respective column, and save the file in CSV format. (You can read about the CSV file on What is a CSV file?)

2. Select "Send SMS" on the panel, and click on the mobile number field to import the sheet created by using the Upload File option which appears on the right-hand side of the screen.

   

3. Enter the Sender ID through which you wish to send the SMS

4. Select the column in which the mobile numbers are present.

   

5. Type in the content of the SMS you wish to send. Select the variable field where you want the variable field to be inserted.

   

6. Set the name of the campaign, and Click on Preview and Send.

7. Once you are sure by checking the preview you can send the SMS by pressing the Start SMS process button.

NOTE: If sent without a country code, submission and deduction depend on the detected country based on the starting number: For, 91xxxxxxxxxx, etc

Frequently Asked Questions

Why use custom SMS instead of regular bulk SMS?

Custom SMS enhances engagement by adding personal touches (e.g., “Hi Martha”), boosting open rates and customer connection.

How do I insert personalized fields into my message?

In the message composer, use the insert-variable option where needed (like {{name}}). Map to your CSV column during preview.

How can I monitor delivery and read rates?

MSG91 provides delivery logs and reports in the dashboard to track custom SMS status after sending. (Common with all SMS campaigns.)

Is DND or spam regulation compliance handled automatically?

MSG91 suites support regulatory compliance, but you should ensure recipient opt-in and include opt-out instructions or abide by regional SMS laws.