# Phone Number

The `Phone` field accepts any phone number. whether domestic or international. It also validates the phone number to make sure it's valid.

A badly formatted entry will trigger a validation error on submission and require the user to fix the entry.

![](/files/9IxajCUVjgLuE9pvv5k6)

### Authentication <a href="#example" id="example"></a>

If you configure a Feathery auth integration, you can send an SMS code to the collected phone number. Just add a button with the click action `Send SMS Verification Code`.

### For Developers <a href="#example" id="example"></a>

The Feathery SDK and API reference phone fields with `type` equal to `phone_number`. The submitted value is a `string`.


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