I’m trying to transfer the call. In my logs, it shows that the tool is being triggered, but I’m not receiving the call transfer. Call ID: 019a781e-7471-7ff1-97fc-3837ee976ae5 Org ID: 61d09b13-129f-4353-9eb3-0e7ee89eb6b8 https://cdn.discordapp.com/attachments/1438160017034448906/1438160018884268146/image.png?ex=6942b164&is=69415fe4&hm=00ed2fa32e478a8b764ed1cfba28cffc9620ec069b6cf03757f95decf465ecaf& https://cdn.discordapp.com/attachments/1438160017034448906/1438160020008075425/image.png?ex=6942b164&is=69415fe4&hm=df1abea51759449c3d5ac8c6a28bcb604258dd0555ee33a002edef2d20ca905e&

Hi there 👋 We’ll take a look at your setup as soon as we can. While you wait, you might find these resources helpful: - ⚙ [Configuration guide for assistant-based warm transfers](https://docs.vapi.ai/calls/assistant-based-warm-transfer#configuration) - 📘 [Full documentation for creating or updating a TransferCallTool](https://docs.vapi.ai/api-reference/tools/create#request.body.TransferCallTool) If you’re running into a specific issue, please include your Call ID (if you haven’t already) so we can investigate!

Suggestion: Check your assistant's configuration for the

serverMessages

property. If it includes

"phone-call-control"

, remove it to allow Vapi to manage call transfers. Here’s how your configuration should look:

json
{
  "assistant": {
    "serverMessages": ["status-update"] // Remove "phone-call-control" if present
  }
}

After updating, test the transfer again to see if the issue is resolved. For more details, see the [Vapi troubleshooting guide](https://docs.vapi.ai/phone-calling/transfer-calls/debug-forwarding-drops). Source: - [Debug call forwarding drops](https://docs.vapi.ai/phone-calling/transfer-calls/debug-forwarding-drops)

Is there any configuration I should set up to transfer the call? I’m trying to transfer calls to my landline cell number, but I’m not receiving anything—even though the tool is being called and triggered correctly.

Hi, I can help resolve this. Your logs show the transfer function triggers, but the call not reaching your landline/cell could be due to number format, regional restrictions, or VAPI transfer settings. Please confirm your number includes the correct country code and whether you’ve tested transferring to a different type of number (like VoIP). @Rafael

My number has the correct country code for Brazil, which is +55. I also tried with a VoIP number, +551151700007, but it didn’t work—the assistant triggers the "end call" tool, but nothing happens. @Manja manna

Thanks for the update. If both your Brazilian number (+55) and the VoIP line didn’t receive the transfer even though the tool was triggered, it’s likely a routing or provider-level restriction on VAPI’s side rather than your configuration. Next step is to test with a fully international E.164 format and verify whether your project has outbound calling enabled for those regions. If you want, we can go over your setup privately and I can help you pinpoint exactly where the block is happening and how to fix it. @Rafael

How can I test using a fully international E.164 format? @Manja manna

Use the full E.164 format: plus sign (+), country code, area code, and number—no spaces or symbols. For example, +5511XXXXXXXX for your Brazil line. We can also review a few test transfers privately to pinpoint if it’s a routing or assistant setup issue. @Rafael