---
title: 4002: Phone not available | API Docs
description: Phone is offline or unreachable.
---

Phone is offline or unreachable. This is an HTTP 500 error indicating the **sender** line on your account is not currently connected.

## Troubleshooting

- Check the status of the sender line in your dashboard.
- Retry the request after a short delay — the line may come back online automatically.
- If the line stays offline, subscribe to the `phone_number.status_updated` webhook to be notified when it reconnects.

## Related

- [Sending messages](/guides/messaging/sending-messages/index.md)
- [Debugging](/guides/platform/debugging/index.md)