How To Attach Files to MMS Using Custom Values

Custom values in Stack are incredibly powerful and versatile, especially when used in workflows to send MMS messages. This guide walks you through the process of using custom values to enhance your messaging capabilities.

Topics Covered

• Attaching Custom Values URLs to MMS messages
• Troubleshooting common issues
• MMS size limits for SMS
• Supported file types for MMS

Attaching Custom Values URLs to MMS Messages

Step 1: Set Up Your Custom Value URL

1. Navigate to Location Settings.
2. Go to Custom Values.
3. Click on + Add Custom Value.
4. Enter your MMS URL.

Step 2: Integrate Custom Values into Your Workflow

1. Access the workflow where you plan to send the MMS.
2. Attach the custom value as an attachment by copying and pasting the value into the appropriate field.

Important Note

Different carriers have specific requirements for MMS sizes. These limitations are set by the carriers themselves. For detailed information on size requirements by carrier, refer to the section below.

Troubleshooting

What is the Maximum MMS Size When Sending SMS?

Carrier	Long Code	Toll-Free	Shortcode
AT&T	0.6 MB	0.6 MB	0.6 MB
Sprint	1.4 MB	0.6 MB	1.4 MB
T-Mobile	1.5 MB	0.6 MB	1.0 MB
Verizon	0.675 MB	0.6 MB	1.2 MB

Supported File Types for MMS

• JPEG
• PNG
• GIF

Why Doesn’t My Custom Value Work?

If your custom value isn’t working as expected, try the following:

• Ensure there are no spaces in your custom value URL. Test this by adding the URL to a dummy funnel and previewing the page. If the MMS displays correctly, the custom value is functioning.
• Verify that the MMS URL complies with the size requirements for the carrier you’re using (refer to the size table above).

By following these steps, you can effectively use custom values to attach files to MMS messages in Stack, making your communications more dynamic and engaging.