Hey i have a problem, We’re currently trying to fix a call transfer issue in Vapi for a voice assistant. It is supposed to transfer callers to an internal phone number using Twilio, but the transfer starts and then fails instead of reaching the destination phone properly. At this point, we’ve already ruled out a few obvious causes. The target number is being sent in the correct international format, and we also changed the transfer setup so it no longer relies on the earlier AI summary step that was causing trouble before. So that part is no longer the main issue. On the Twilio side, it looks like Twilio is actually trying to place the outbound call. In the call details, that leg even shows up as completed, so this does not look like a simple invalid number or basic permissions problem. The strange part is that the destination mobile phone still does not ring normally, while Vapi continues to report the overall transfer as failed. So our current understanding is this: the transfer is being triggered correctly, but the actual handoff is not completing properly. The problem now seems more likely to be somewhere between Vapi and Twilio during the transfer itself, or on the destination side, for example voicemail, call forwarding, call screening, or some other network behavior that prevents the call from arriving like a normal incoming call.