[Home](./index.md) > [@firebase/auth](./auth.md) > [PhoneMultiFactorGenerator](./auth.phonemultifactorgenerator.md) ## PhoneMultiFactorGenerator class Provider for generating a [PhoneMultiFactorAssertion](./auth.phonemultifactorassertion.md). Signature: ```typescript export declare class PhoneMultiFactorGenerator ``` ## Methods | Method | Modifiers | Description | | --- | --- | --- | | [assertion(credential)](./auth.phonemultifactorgenerator.assertion.md) | static | Provides a [PhoneMultiFactorAssertion](./auth.phonemultifactorassertion.md) to confirm ownership of the phone second factor. |