[Home](./index.md) > [@firebase/auth-types](./auth-types.md) > [PhoneAuthProvider](./auth-types.phoneauthprovider.md) > [PROVIDER\_ID](./auth-types.phoneauthprovider.provider_id.md) ## PhoneAuthProvider.PROVIDER\_ID property Always set to [ProviderId.PHONE](./auth-types.providerid.phone.md). Signature: ```typescript static readonly PROVIDER_ID: ProviderId; ```