Hi Team, I've recently started using Vapi for outbound calls, I also purchased a phone number from Twillio and I configured it in the Vapi dashboard but When I upload a campaign.csv for calls it not calling anyone, its just showing in progress and queued but no one receives any calls. I tried adding my own phone number and my friends and family's phone number but for some reason its only calling me and not calling anyone else. Why is this happening, can anyone explain please.

It sounds like your campaign may not be calling all recipients due to CSV formatting issues. Please ensure your CSV file uses a lowercase

number

column and that all phone numbers are in E.164 format (e.g.,

+14151234567

). Here’s a sample CSV structure:

number
+14151234567
+14153455678

Double-check for extra spaces, blank rows, or incorrect column names—these are common causes for calls not being placed. For more details, see the [Outbound Campaigns overview](https://docs.vapi.ai/outbound-campaigns/overview). Source: - [Outbound campaigns overview](https://docs.vapi.ai/outbound-campaigns/overview)

the csv is in the format, as I'm based in India its like "+911234567890" still its not initiating I check the call logs its showing this error: An error occurred in this call: call.start.error-get-transport

The error

call.start.error-get-transport

means there was an issue retrieving transport information when starting the call—this is a connectivity or system-level problem, not a CSV or SIP setup issue. Action: Please contact Vapi support with your call logs and the error code for further investigation, as this error typically requires backend review. Reference: > "call.start.error-get-transport: Error retrieving transport information during call start." See the [call ended reasons documentation](https://docs.vapi.ai/calls/call-ended-reason) for more details. Source: - [Call ended reasons documentation](https://docs.vapi.ai/calls/call-ended-reason)

Are you able to call India phone numbers directly with your twilio number? If not, you might have to enable it first on the Twilio settings:

It worked, the issue was i was on trial plan on twilio's phone number, after upgrade it's working

Great! Glad to hear it was resolved.