# 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. ![](/files/-MBzMZFYbSoPRP3pHc-T) ## đŸ”…Phone confirmation properties You may configure additional email validator properties from the [answer properties](/form-management/form-designer/answers/answer-properties.md) page. * **`Twilio account`** [twilio](/installation-setup/system-settings/mobile-messenging/twilio.md) account that should be used to send the SMS. * **`Twilio account token`** [twilio](/installation-setup/system-settings/mobile-messenging/twilio.md) 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](/form-management/form-designer/multi-language-forms.md) 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 %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.ngsurvey.com/form-management/form-designer/answers/answer-types/phone-confirmation.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.