[Home](./index.md) > [@firebase/auth](./auth.md) > [PhoneInfoOptions](./auth.phoneinfooptions.md) ## PhoneInfoOptions type The information required to verify the ownership of a phone number. Signature: ```typescript export declare type PhoneInfoOptions = PhoneSingleFactorInfoOptions | PhoneMultiFactorEnrollInfoOptions | PhoneMultiFactorSignInInfoOptions; ``` ## Remarks The information that's required depends on whether you are doing single-factor sign-in, multi-factor enrollment or multi-factor sign-in.