# Phone Confirmation

The phone confirmation answer type will validate the mobile phone number entered by the respondent using a unique code that will be sent to the respondent by SMS and which is required to submit the survey if the phone confirmation field has been set as required.

![](https://1025048312-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M8fLhS0bmfBRyq0HdUm%2F-MBzMQHJd0Bmc18ntYvz%2F-MBzMZFYbSoPRP3pHc-T%2Fimage.png?alt=media\&token=744a0ab8-ae6e-4e3f-9f12-617eea4f941f)

## 🔅Phone confirmation properties

You may configure additional email validator properties from the [answer properties](https://docs.ngsurvey.com/form-management/form-designer/answers/answer-properties) page.

* **`Twilio account`** [twilio](https://docs.ngsurvey.com/installation-setup/system-settings/mobile-messenging/twilio) account that should be used to send the SMS.
* **`Twilio account token`** [twilio](https://docs.ngsurvey.com/installation-setup/system-settings/mobile-messenging/twilio) API access token.
* **`From phone number`** number from which the SMS should originate from. 
* **`Message body`** confirmation sms message body. The {**0}** tag is replaced at runtime by the validation code.
* **`Default country`** country that is selected by default in the phone entry field.
* **`Expires after`** minutes after which  the authorization of the confirmation validation is not valid anymore and requires the respondent to re-confirm.

{% hint style="info" %}
n [multi-language](https://docs.ngsurvey.com/form-management/form-designer/multi-language-forms) surveys you can define different properties for each of your language. To set these properties for a given language select the edition language in the designer and then update the properties.  
{% endhint %}