> ## Documentation Index
> Fetch the complete documentation index at: https://docs.retellai.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Phone call testing

> Test a Retell voice agent over a real phone call using a purchased Retell phone number — quickly validate real-world audio, latency, and prompt behavior.

You can purchase a Retell phone number and easily test your agent by making phone calls.

Check this [page](/deploy/purchase-number) for more details.