# Use cases: what AI agents do with a phone number

Common jobs for an AI agent with its own phone line, and what each one needs.

- [AI receptionist phone number: how to set one up](https://numberforagents.com/use-cases/ai-receptionist-phone-number): Give an AI receptionist a phone number: forwarding vs new number vs porting, call flow, human transfer, after-hours, SMS follow-up, and US AI voice rules.
- [Appointment reminder SMS agent](https://numberforagents.com/use-cases/appointment-reminder-sms-agent): Build an AI agent that texts appointment reminders and handles confirm, cancel, and reschedule replies. Consent rules, healthcare limits, 10DLC, and STOP.
- [One phone number per customer: provisioning for AI agent platforms](https://numberforagents.com/use-cases/phone-numbers-for-ai-agent-platforms): How AI agent platforms give every customer its own phone number through an API: data model, provisioning, webhook routing, tenant isolation, and 10DLC.