Twilio studio let’s you config a call flow visually for this. Alternatively you can use TokTiv a free (limited number of users) PBX from an Indian company that

Twilio studio let’s you config a call flow visually for this. Alternatively you can use TokTiv a free (limited number of users) PBX from an Indian company that relies on Twilio numbers: https://www.toktiv.com/ https://www.toktiv.com/ I’ve been using it for a year. It’s been buggy at times but improving.