showBannerAd() { let bannerConfig: AdMobFreeBannerConfig = { isTesting: true, // Remove in production autoShow: true, bannerAtTop: false, id: "ca-app-pub-3940256099942544/6300978111" }; this.admobFree.banner.config(bannerConfig); this.admobFree.banner.prepare().then(() => { // success }).catch(e => alert(e)); }