[Home](./index.md) > [@firebase/auth](./auth.md) > [PhoneMultiFactorEnrollInfoOptions](./auth.phonemultifactorenrollinfooptions.md) ## PhoneMultiFactorEnrollInfoOptions interface Options used for enrolling a second factor. Signature: ```typescript export interface PhoneMultiFactorEnrollInfoOptions ``` ## Properties | Property | Type | Description | | --- | --- | --- | | [phoneNumber](./auth.phonemultifactorenrollinfooptions.phonenumber.md) | string | Phone number to send a verification code to. | | [session](./auth.phonemultifactorenrollinfooptions.session.md) | [MultiFactorSession](./auth.multifactorsession.md) | The [MultiFactorSession](./auth.multifactorsession.md) obtained via [MultiFactorUser.getSession()](./auth.multifactoruser.getsession.md). |