How do I get VAPI to get the caller's phone number automatically to send an SMS instead of the assistant asking for the caller's phone number? I am using this in my prompt: SMS Policy - Always send an SMS to the caller at the beginning of each call. - Use the caller’s phone number from metadata: {{call.callerNumber}}. - Do NOT ask the caller to provide their number unless {{call.callerNumber}} is missing.

does {{call.callerNumber}} get the number? I have been having the same issue with API calls trying to lookup the caller name by ptheir phone number. but only in assistants, I had it working in workflow for some reason but the same variable and tool didnt work in assistant mode

Please use {{customer.number}} as the variable. This is a default variable that is stored on call start