Who This Is For / When to Use
This article is for account admins who want to automatically follow up with callers when a call is missed.
Use this when:
You want an automatic SMS sent after a missed call.
You need basic follow-up or advanced conditional logic using workflows.
Part 1: Enable Missed Call Text Back in Settings
This method uses built-in voice settings for a simple, immediate setup.
Step 1: Open Phone Number Voice Settings
Navigate to Settings (bottom-left navigation).
Select Phone Numbers.
Open Advanced Settings.
Click Voicemail & Missed Call TextBack.
Step 2: Select Missed Call Text Back
In the left sidebar, click Missed Call Text Back.
Step 3: Enable and Customize the Message
Toggle Enable Missed Call Text Back.
Click Customize to edit the SMS message.
Step 4: Edit and Save the Message
Enter your custom SMS message.
(Optional) Send a test message.
Click Save.
Incoming Call Timeout Settings
Incoming Call Timeout controls how long a phone rings before voicemail is triggered.
Recommended configuration ensures accurate call status reporting.
Recommended Timeout Range
15–20 seconds is recommended.
Effects of Incorrect Timeout Values
Over 20 seconds:
Calls may route to carrier voicemail.
Call status may be marked as Completed instead of Voicemail.
Under 15 seconds:
Calls may disconnect too quickly.
Agents may not have enough time to answer.
Part 2: Customize Missed Call Behavior Using Workflows
Workflows allow advanced logic, delays, tagging, and conditional messaging.
IMPORTANT: If you use a workflow for missed call messaging, disable Missed Call Text Back in settings to avoid duplicate SMS messages.
Step 1: Open Workflows
Go to Automations.
Click Workflows.
Select Create Workflow.
Choose Select from Template.
Step 2: Select the Auto Missed Call Text Back Recipe
Search for Auto Missed Call Text Back.
Select the recipe.
Step 3: Customize and Publish the Workflow
Review and customize triggers and actions.
Optional actions include:
Wait steps (e.g., 20+ minutes).
Tag-based filtering to prevent repeat messages.
Change status from Draft to Publish.
Important Behavior Notes
The built-in Missed Call Text Back sends an SMS for every missed call, even repeated calls from the same number.
Workflows are recommended if you want:
Rate limiting.
Conditional messaging.
Time-based delays.
FAQ
How do I enable the Missed Call Text Back feature?
Go to Settings > Phone Numbers > Advanced Settings > Voicemail & Missed Call TextBack, then enable Missed Call Text Back and customize the message.
What if I want more customization than the settings allow?
Use a workflow with the Auto Missed Call Text Back recipe. Disable the settings-based option to avoid duplicate messages.
Can I customize the message sent for missed calls?
Yes. You can customize the message directly in settings or within a workflow.
What happens if I use both settings and workflows?
Both will trigger messages unless you disable the settings option. Always disable settings when using workflows.
What is the recommended incoming call timeout?
Set the timeout between 15 and 20 seconds.
Will messages send for repeated missed calls?
Yes. By default, one SMS is sent per missed call. Use workflows to control repeat behavior.
What happens if my timeout is over 20 seconds?
Calls may route to carrier voicemail and be marked as Completed instead of Voicemail.