[Home](./index.md) > [@firebase/auth](./auth.md) > [PhoneAuthProvider](./auth.phoneauthprovider.md) > [PHONE\_SIGN\_IN\_METHOD](./auth.phoneauthprovider.phone_sign_in_method.md) ## PhoneAuthProvider.PHONE\_SIGN\_IN\_METHOD property Always set to [SignInMethod.PHONE](./auth.signinmethod.phone.md). Signature: ```typescript static readonly PHONE_SIGN_IN_METHOD = SignInMethod.PHONE; ```