Thanks for sharing the details of your setup. From what you've described, it looks like the call is being placed successfully, but the agent isn't speaking, even though prompts are set on both the Relevance AI and Vapi sides. One thing that stands out is that in your configuration images, the Phone Number ID and Assistant ID are listed as "not specified." These fields are essential for the agent to know which voice and prompts to use during the call. If these IDs aren't set correctly, the agent may not have the necessary information to start the conversation, which could explain why nothing is being said on the call. Double-checking that these values are correctly filled in your tool configuration might help resolve the issue.