Vapi call Transfer not working
# supportd
DaDâ„¢
05/05/2025, 4:34 PMHi , can anyone please help me with vapi call transfers? I tried the resources in YouTube but to no avail.
Issue is that the call gets an error when the assistant is on the transferring phase already. there is 1 beep then error message pops up. i tried creating another assistant, and also tried changing the numbers for call forwarding but I'm not receiving any calls. Im Using Vapi free number on this account. your inputs would be much appreciated. thank you!
v
Vapi Support Bot
05/05/2025, 4:36 PMHi there! I understand you're having issues with Vapi call transfers using a free number, where the call errors during the transferring phase.
Could you please share the specific error message that appears after the beep? This would help identify whether the issue is related to number reputation, SIP configuration, or another common problem with Vapi call transfers.
Vapi Support Bot
05/05/2025, 4:36 PMHi there! I understand you're having issues with Vapi call transfers using a free number, where the call errors during the transferring phase.
Could you please share the specific error message that appears after the beep? This would help identify whether the issue is related to number reputation, SIP configuration, or another common problem with Vapi call transfers.
k
Kings_bigđŸ’«
05/05/2025, 7:40 PMThis maybe due to number formatting, misconfigured assistant tools, limitations with free numbers, or missing fallback logic, check the call logs and try a paid number to help diagnose the error.
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DaDâ„¢
05/06/2025, 2:20 PMhello, there isnt any message after the beep. the assistant goes silent and if i talk to the assistant he replies transferring the call please wait. then again another beep then error occurs but upon clicking the error message to check what error it is. the error is empty.
DaDâ„¢
05/06/2025, 2:22 PMwill try paid number and update you. still trying some of the alternatives online using the documentation but same error. thank you!
k
Kings_bigđŸ’«
05/06/2025, 3:48 PMHave you tried using paid number?
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DaDâ„¢
05/06/2025, 4:15 PMnot yet, I was reading other post so im just waiting for them to confirm that its resolved before trying the paid number >>>The Vapi team has confirmed there's a widespread call forwarding issue affecting multiple users across the platform. According to information from Discord channels, this is a problem on Vapi's end that their team is actively working to resolve. The expected timeline for a fix is mid-next week, as communicated by the Vapi support team. While the exact technical cause hasn't been publicly disclosed, this is a known issue being addressed at the system level rather than something that can be fixed through user configuration.
DaDâ„¢
05/07/2025, 4:22 AMi tried using twilio just recently using a sample script
DaDâ„¢
05/07/2025, 4:22 AMim receiving the same error
DaDâ„¢
05/07/2025, 4:24 AMor does it not work with twilio trial number aswell? i got free trial with $14 credits
DaDâ„¢
05/07/2025, 4:25 AMi just want to try it before buying a number if it works then decide to get one
k
Kings_bigđŸ’«
05/07/2025, 2:17 PMSend call id
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DaDâ„¢
05/08/2025, 10:57 AMwhat do you mean?
DaDâ„¢
05/08/2025, 10:58 AM+1 (754) 297 5074 is my twilio number
c
Chiranjeet Mishra
05/08/2025, 11:13 AMI mean your call id
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DaDâ„¢
05/08/2025, 11:33 AMDaDâ„¢
05/08/2025, 11:40 AMcant determine the error,. it just says unknown error
https://cdn.discordapp.com/attachments/1368989121112178698/1370002429625630780/call.PNG?ex=681de9b0&is=681c9830&hm=93ddb1ac507d0cda597c85a52f201122b3858887726c9e8e2890d47755bf2a2d&
DaDâ„¢
05/08/2025, 11:46 AM{
"role": "tool_calls",
"time": 1746704250364,
"message": "",
"toolCalls": [
{
"id": "call_F24MZamYSrqIwdsZNC9ySn41",
"type": "function",
"function": {
"name": "transferCall",
"arguments": "{\"destination\": \"+14136797441\"}"
}
}
],
"secondsFromStart": 4.362
}
{
"name": "transferCall",
"role": "tool_call_result",
"time": 1746704254178,
"result": "Success.",
"toolCallId": "call_F24MZamYSrqIwdsZNC9ySn41",
"secondsFromStart": 8.176
}
k
Kings_bigđŸ’«
05/08/2025, 12:51 PMGet your Call ID from the dashboard under the Calls section, via webhook event payloads, or by listing calls through the Vapi API.
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DaDâ„¢
05/08/2025, 12:53 PMea80ce59-25dd-411d-8d75-3026e3f527d1
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Chiranjeet Mishra
05/08/2025, 4:23 PMLooking into it
k
Kings_bigđŸ’«
05/09/2025, 8:00 AMRemove
phone-call-controld
DaDâ„¢
05/09/2025, 4:54 PMturned off phone-call-control this is the id 9d11f5b1-143a-451a-b70b-08fef31cad03
DaDâ„¢
05/09/2025, 4:56 PMturned on phone-call-control and this is the id dcee7dac-c260-47d6-8e91-9c715e39228d it says assistant forwarded the call but i get an error upon transfer. will transfers work upon test? or only on actual call? cause this id says its forwarded but cuts me from the transfer
c
Chiranjeet Mishra
05/11/2025, 12:32 AMCurrently, web calls cannot be transferred to phone calls, which is why it's not working for you. To transfer a phone call, you must end your first web call and trigger the phone call separately or explicitly. I understand this may disrupt your user experience, but there's no alternative at the moment.
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DaDâ„¢
05/11/2025, 4:42 PMhi, i tried calling inbound and transferring the call. evaluation says pass but the transfer is never recieved on my other phone.
DaDâ„¢
05/11/2025, 4:43 PMc
Chiranjeet Mishra
05/14/2025, 10:00 PMWhat is the configuration of your other number that you attempted to transfer to?
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