I need to make outbound calls to Indian mobile numbers using Vapi. Will a US Twilio number (+1) work for this, or do I need an Indian number? And is Indian number available on Twilio without business registration?

you don't need an Indian Twilio number. Twilio actually only allows outbound calls to India from international numbers, so your US (+1) number is the right choice here. Indian local numbers aren't available on Twilio for purchase, and even if they were, they can't be used for outbound calling to Indian mobiles via Twilio's platform. One thing to flag: Calls from a +1 number can sometimes show as spam or get ignored on Indian devices. If answer rates become an issue, I'd recommend switching to an Indian CPaaS provider like Exotel or Plivo both integrate cleanly with Vapi and have better local deliverability without heavy registration requirements. My suggestion: Start with your US Twilio number to get the Vapi flow working, then we can assess call performance and switch providers if needed. Let me know if you'd like help setting up the integration. @Aaravvv

US (+1) number calling India: Yes, a US Twilio number can make calls to Indian mobile numbers - Vapi supports this. However, delivery rates may vary depending on Twilio's carrier routing. This is a Twilio question rather than a Vapi limitation.