[Home](./index.md) > [@firebase/auth](./auth.md) > [PhoneMultiFactorSignInInfoOptions](./auth.phonemultifactorsignininfooptions.md) ## PhoneMultiFactorSignInInfoOptions interface Options used for signing-in with a second factor. Signature: ```typescript export interface PhoneMultiFactorSignInInfoOptions ``` ## Properties | Property | Type | Description | | --- | --- | --- | | [multiFactorHint?](./auth.phonemultifactorsignininfooptions.multifactorhint.md) | [MultiFactorInfo](./auth.multifactorinfo.md) | (Optional) The [MultiFactorInfo](./auth.multifactorinfo.md) obtained via [MultiFactorResolver.hints](./auth.multifactorresolver.hints.md).One of multiFactorHint or multiFactorUid is required. | | [multiFactorUid?](./auth.phonemultifactorsignininfooptions.multifactoruid.md) | string | (Optional) The uid of the second factor.One of multiFactorHint or multiFactorUid is required. | | [session](./auth.phonemultifactorsignininfooptions.session.md) | [MultiFactorSession](./auth.multifactorsession.md) | The [MultiFactorSession](./auth.multifactorsession.md) obtained via [MultiFactorResolver.session](./auth.multifactorresolver.session.md). |