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

# Phone numbers

> Add phone numbers for SMS, voice, personal inboxes, outbound campaigns, and appointment reminders.

Admins add phone numbers from **Settings → Channels**. Numbers can support SMS, voice, or both.

## Add a number

1. Go to **Settings → Channels**.
2. Click **Add phone number**.
3. Choose **United States** or **Canada**.
4. Optionally enter an area code.
5. Select a number.
6. Click **Add number**.

## Assign a number

After a number is added, use it in one of these places:

| Use                         | Where to configure                               |
| --------------------------- | ------------------------------------------------ |
| Shared SMS or voice inbox   | **Settings → Inboxes → Channels**                |
| Personal inbox phone number | **Settings → Connected channels**                |
| Outbound SMS or calls       | Outbound sequence sender setup                   |
| Appointment reminders       | **Settings → Appointment types → Notifications** |

## Avoid conflicts

A phone number already used by an inbox or outbound sender may not be available in another setup flow. Review the **In use** badge and tooltip in **Settings → Channels** before reassigning numbers.

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  Screenshot placeholder: add the available-number picker and phone-number list.
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