diff --git a/source/plugin/Assets/GoogleMobileAds/Api/AdManagerBannerView.cs b/source/plugin/Assets/GoogleMobileAds/Api/AdManagerBannerView.cs
index ad8ad2ee1..77c3a83ce 100644
--- a/source/plugin/Assets/GoogleMobileAds/Api/AdManagerBannerView.cs
+++ b/source/plugin/Assets/GoogleMobileAds/Api/AdManagerBannerView.cs
@@ -23,13 +23,55 @@ namespace GoogleMobileAds.Api.AdManager
     /// Banner view that works with Google Ad Manager. Banner views occupy a spot within an app's
     /// layout. They stay on screen while users are interacting with the app.
     /// </summary>
-    public class AdManagerBannerView : BannerView
+    public class AdManagerBannerView
     {
+        /// <summary>
+        /// Raised when an ad is loaded into the banner view.
+        /// </summary>
+        public event Action OnBannerAdLoaded;
+
+        /// <summary>
+        /// Raised when an ad fails to load into the banner view.
+        /// </summary>
+        public event Action<LoadAdError> OnBannerAdLoadFailed;
+
+        /// <summary>
+        /// Raised when the ad is estimated to have earned money.
+        /// </summary>
+        public event Action<AdValue> OnAdPaid;
+
+        /// <summary>
+        /// Raised when an ad is clicked.
+        /// </summary>
+        public event Action OnAdClicked;
+
+        /// <summary>
+        /// Raised when an impression is recorded for an ad.
+        /// </summary>
+        public event Action OnAdImpressionRecorded;
+
+        /// <summary>
+        /// Raised when an ad opened full-screen content.
+        /// </summary>
+        public event Action OnAdFullScreenContentOpened;
+
+        /// <summary>
+        /// Raised when the ad closed full-screen content.
+        /// On iOS, this event is only raised when an ad opens an overlay, not when opening a new
+        /// application such as Safari or the App Store.
+        /// </summary>
+        public event Action OnAdFullScreenContentClosed;
+
         /// <summary>
         /// Raised when the app receives an event from the banner ad.
         /// </summary>
         public event Action<AppEvent> OnAppEventReceived;
 
+        /// <summary>
+        /// Returns true if Destroy() has been called.
+        /// </summary>
+        public bool IsDestroyed { get { return _client == null; } }
+
         /// <summary>
         /// Sets the supported sizes of the banner ad. In most cases, only one ad size will be
         /// specified. Use one of the predefined standard ad sizes (such as AdSize.MediumRectangle),
@@ -50,10 +92,12 @@ public class AdManagerBannerView : BannerView
         /// </summary>
         public List<AdSize> ValidAdSizes
         {
-            get { return ((IAdManagerBannerClient)_client).ValidAdSizes; }
-            set { ((IAdManagerBannerClient)_client).ValidAdSizes = value; }
+            get { return _client.ValidAdSizes; }
+            set { _client.ValidAdSizes = value; }
         }
 
+        internal IAdManagerBannerClient _client;
+
         /// <summary>
         /// Creates an Ad Manager banner view with a standard position.
         /// </summary>
@@ -74,11 +118,195 @@ public AdManagerBannerView(string adUnitId, AdSize adSize, int x, int y)
             ConfigureBannerEvents();
         }
 
-        protected internal override void ConfigureBannerEvents()
+        /// <summary>
+        /// Destroys the banner view.
+        /// </summary>
+        public void Destroy()
+        {
+            if (_client != null)
+            {
+                _client.DestroyBannerView();
+                _client = null;
+            }
+        }
+
+        /// <summary>
+        /// Returns the ad unit ID.
+        /// </summary>
+        public string GetAdUnitID()
+        {
+            return _client != null ? _client.GetAdUnitID() : null;
+        }
+
+        /// <summary>
+        /// Returns the ad request response info or null if the ad is not loaded.
+        /// </summary>
+        public ResponseInfo GetResponseInfo()
+        {
+            return _client != null ? new ResponseInfo(_client.GetResponseInfoClient()) : null;
+        }
+
+        /// <summary>
+        /// Returns the height of the banner view in pixels.
+        /// </summary>
+        public float GetHeightInPixels()
+        {
+            return _client != null ? _client.GetHeightInPixels() : 0;
+        }
+
+        /// <summary>
+        /// Returns the width of the banner view in pixels.
+        /// </summary>
+        public float GetWidthInPixels()
+        {
+            return _client != null ? _client.GetWidthInPixels() : 0;
+        }
+
+        /// <summary>
+        /// Loads an ad into the banner view.
+        /// </summary>
+        public void LoadAd(AdRequest request)
+        {
+            if (_client != null)
+            {
+                _client.LoadAd(request);
+            }
+        }
+
+        /// <summary>
+        /// Shows the banner view.
+        /// </summary>
+        public void Show()
+        {
+            if (_client != null)
+            {
+                _client.ShowBannerView();
+            }
+        }
+
+        /// <summary>
+        /// Hides the banner view.
+        /// </summary>
+        public void Hide()
+        {
+            if (_client != null)
+            {
+                _client.HideBannerView();
+            }
+        }
+
+        /// <summary>
+        /// Sets the position of the banner view using standard position.
+        /// </summary>
+        public void SetPosition(AdPosition adPosition)
         {
-            base.ConfigureBannerEvents();
+            if (_client != null)
+            {
+                _client.SetPosition(adPosition);
+            }
+        }
+
+        /// <summary>
+        /// Sets the position of the banner view using custom position.
+        /// </summary>
+        public void SetPosition(int x, int y)
+        {
+            if (_client != null)
+            {
+                _client.SetPosition(x, y);
+            }
+        }
+
+        /// <summary>
+        /// Indicates whether the last loaded ad is a collapsible banner.
+        /// </summary>
+        public bool IsCollapsible()
+        {
+            return _client == null ? false : _client.IsCollapsible();
+        }
+
+        private void ConfigureBannerEvents()
+        {
+            
+            _client.OnAdLoaded += (sender, args) =>
+            {
+                MobileAds.RaiseAction(() =>
+                {
+                    if (OnBannerAdLoaded != null)
+                    {
+                        OnBannerAdLoaded();
+                    }
+                });
+            };
+
+            _client.OnAdFailedToLoad += (sender, args) =>
+            {
+                LoadAdError loadAdError = new LoadAdError(args.LoadAdErrorClient);
+                MobileAds.RaiseAction(() =>
+                {
+                    if (OnBannerAdLoadFailed != null)
+                    {
+                        OnBannerAdLoadFailed(loadAdError);
+                    }
+                });
+            };
+
+            _client.OnAdOpening += (sender, args) =>
+            {
+                MobileAds.RaiseAction(() =>
+                {
+                    if (OnAdFullScreenContentOpened != null)
+                    {
+                        OnAdFullScreenContentOpened();
+                    }
+                });
+            };
+
+            _client.OnAdClosed += (sender, args) =>
+            {
+                MobileAds.RaiseAction(() =>
+                {
+                    if (OnAdFullScreenContentClosed != null)
+                    {
+                        OnAdFullScreenContentClosed();
+                    }
+                });
+            };
+
+            _client.OnPaidEvent += (adValue) =>
+            {
+                MobileAds.RaiseAction(() =>
+                {
+                    if (OnAdPaid != null)
+                    {
+                        OnAdPaid(adValue);
+                    }
+                });
+            };
+
+            _client.OnAdClicked += () =>
+            {
+                MobileAds.RaiseAction(() =>
+                {
+                    if (OnAdClicked != null)
+                    {
+                        OnAdClicked();
+                    }
+                });
+            };
+
+            _client.OnAdImpressionRecorded += () =>
+            {
+                MobileAds.RaiseAction(() =>
+                {
+                    if (OnAdImpressionRecorded != null)
+                    {
+                        OnAdImpressionRecorded();
+                    }
+                });
+            };
 
-            ((IAdManagerBannerClient)_client).OnAppEvent += (appEvent) =>
+            _client.OnAppEvent += (appEvent) =>
             {
                 MobileAds.RaiseAction(() =>
                 {
diff --git a/source/plugin/Assets/GoogleMobileAds/Api/AdManagerInterstitialAd.cs b/source/plugin/Assets/GoogleMobileAds/Api/AdManagerInterstitialAd.cs
index a8a717ba6..127b24393 100644
--- a/source/plugin/Assets/GoogleMobileAds/Api/AdManagerInterstitialAd.cs
+++ b/source/plugin/Assets/GoogleMobileAds/Api/AdManagerInterstitialAd.cs
@@ -25,13 +25,48 @@ namespace GoogleMobileAds.Api.AdManager
     /// such as a page change or an app launch for Google Ad Manager publishers.
     /// Interstitials use a close button that removes the ad from the user's experience.
     /// </summary>
-    public class AdManagerInterstitialAd : InterstitialAd
+    public class AdManagerInterstitialAd
     {
+        /// <summary>
+        /// Raised when the ad is estimated to have earned money.
+        /// </summary>
+        public event Action<AdValue> OnAdPaid;
+
+        /// <summary>
+        /// Raised when an ad is clicked.
+        /// </summary>
+        public event Action OnAdClicked;
+
+        /// <summary>
+        /// Raised when an impression is recorded for an ad.
+        /// </summary>
+        public event Action OnAdImpressionRecorded;
+
+        /// <summary>
+        /// Raised when an ad opened full-screen content.
+        /// </summary>
+        public event Action OnAdFullScreenContentOpened;
+
+        /// <summary>
+        /// Raised when the ad closed full-screen content.
+        /// On iOS, this event is only raised when an ad opens an overlay, not when opening a new
+        /// application such as Safari or the App Store.
+        /// </summary>
+        public event Action OnAdFullScreenContentClosed;
+
+        /// <summary>
+        /// Raised when the ad failed to open full-screen content.
+        /// </summary>
+        public event Action<AdError> OnAdFullScreenContentFailed;
+
         /// <summary>
         /// Raised when the app receives an event from the interstitial ad.
         /// </summary>
         public event Action<AppEvent> OnAppEventReceived;
 
+        internal IAdManagerInterstitialClient _client;
+        internal bool _canShowAd;
+
         private AdManagerInterstitialAd(IAdManagerInterstitialClient client)
         {
             _client = client;
@@ -43,7 +78,7 @@ private AdManagerInterstitialAd(IAdManagerInterstitialClient client)
         /// Verify if an ad is preloaded and available to show.
         /// </summary>
         /// <param name="adUnitId">The ad Unit Id of the ad to verify. </param>
-        public static new bool IsAdAvailable(string adUnitId)
+        public static bool IsAdAvailable(string adUnitId)
         {
             if (string.IsNullOrEmpty(adUnitId))
             {
@@ -58,7 +93,7 @@ private AdManagerInterstitialAd(IAdManagerInterstitialClient client)
         /// Returns the next pre-loaded interstitial ad and null if no ad is available.
         /// </summary>
         /// <param name="adUnitId">The ad Unit ID of the ad to poll.</param>
-        public static new InterstitialAd PollAd(string adUnitId)
+        public static AdManagerInterstitialAd PollAd(string adUnitId)
         {
             if (string.IsNullOrEmpty(adUnitId))
             {
@@ -71,7 +106,7 @@ private AdManagerInterstitialAd(IAdManagerInterstitialClient client)
                 return null;
             }
             client.CreateInterstitialAd();
-            return new AdManagerInterstitialAd(client.PollAdManagerAd(adUnitId));
+            return new AdManagerInterstitialAd(client.PollAd(adUnitId));
         }
 
         /// <summary>
@@ -106,11 +141,125 @@ public static void Load(string adUnitId, AdRequest request,
             client.LoadAd(adUnitId, request);
         }
 
-        protected internal override void RegisterAdEvents()
+        /// <summary>
+        /// Returns true if the ad is loaded and not shown.
+        /// </summary>
+        public bool CanShowAd()
+        {
+            return _client != null && _canShowAd;
+        }
+
+        /// <summary>
+        /// Shows the ad.
+        /// </summary>
+        public void Show()
+        {
+            if (CanShowAd())
+            {
+                _canShowAd = false;
+                _client.Show();
+            }
+        }
+
+        /// <summary>
+        /// Destroys the ad.
+        /// </summary>
+        public void Destroy()
+        {
+            if (_client != null)
+            {
+                _canShowAd = false;
+                _client.DestroyInterstitial();
+                _client = null;
+            }
+        }
+
+        /// <summary>
+        /// Returns the ad unit ID.
+        /// </summary>
+        public string GetAdUnitID()
+        {
+            return _client != null ? _client.GetAdUnitID() : null;
+        }
+
+        /// <summary>
+        /// Returns the ad request response info.
+        /// </summary>
+        public ResponseInfo GetResponseInfo()
+        {
+            return _client != null ? new ResponseInfo(_client.GetResponseInfoClient()) : null;
+        }
+
+        private void RegisterAdEvents()
         {
-            base.RegisterAdEvents();
+            _client.OnAdClicked += () =>
+            {
+                MobileAds.RaiseAction(() =>
+                {
+                    if (OnAdClicked != null)
+                    {
+                        OnAdClicked();
+                    }
+                });
+            };
+
+            _client.OnAdDidDismissFullScreenContent += (sender, args) =>
+            {
+                MobileAds.RaiseAction(() =>
+                {
+                    if (OnAdFullScreenContentClosed != null)
+                    {
+                        OnAdFullScreenContentClosed();
+                    }
+                });
+            };
+
+            _client.OnAdDidPresentFullScreenContent += (sender, args) =>
+            {
+                MobileAds.RaiseAction(() =>
+                {
+                    if (OnAdFullScreenContentOpened != null)
+                    {
+                        OnAdFullScreenContentOpened();
+                    }
+                });
+            };
+
+            _client.OnAdDidRecordImpression += (sender, args) =>
+            {
+                MobileAds.RaiseAction(() =>
+                {
+                    if (OnAdImpressionRecorded != null)
+                    {
+                        OnAdImpressionRecorded();
+                    }
+                });
+            };
+
+            _client.OnAdFailedToPresentFullScreenContent += (sender, error) =>
+            {
+                var adError = new AdError(error.AdErrorClient);
+                MobileAds.RaiseAction(() =>
+                {
+                    if (OnAdFullScreenContentFailed != null)
+                    {
+                        OnAdFullScreenContentFailed(adError);
+                    }
+                });
+            };
+
+            _client.OnPaidEvent += (adValue) =>
+            {
+                MobileAds.RaiseAction(() =>
+                {
+                    if (OnAdPaid != null)
+                    {
+                        OnAdPaid(adValue);
+                    }
+                });
+            };
 
-            ((IAdManagerInterstitialClient)_client).OnAppEvent += (appEvent) =>
+            _client.OnAppEvent += (appEvent) =>
             {
                 MobileAds.RaiseAction(() =>
                 {
diff --git a/source/plugin/Assets/GoogleMobileAds/Common/IAdManagerBannerClient.cs b/source/plugin/Assets/GoogleMobileAds/Common/IAdManagerBannerClient.cs
index 8496b5091..34effdab8 100644
--- a/source/plugin/Assets/GoogleMobileAds/Common/IAdManagerBannerClient.cs
+++ b/source/plugin/Assets/GoogleMobileAds/Common/IAdManagerBannerClient.cs
@@ -20,7 +20,7 @@
 
 namespace GoogleMobileAds.Common
 {
-    public interface IAdManagerBannerClient : IBannerClient
+    public interface IAdManagerBannerClient : IBannerBaseClient
     {
         // Ad event fired when the ad sends a message to the application.
         event Action<AppEvent> OnAppEvent;
diff --git a/source/plugin/Assets/GoogleMobileAds/Common/IAdManagerInterstitialClient.cs b/source/plugin/Assets/GoogleMobileAds/Common/IAdManagerInterstitialClient.cs
index 6be4fa91a..b0548fcb7 100644
--- a/source/plugin/Assets/GoogleMobileAds/Common/IAdManagerInterstitialClient.cs
+++ b/source/plugin/Assets/GoogleMobileAds/Common/IAdManagerInterstitialClient.cs
@@ -18,12 +18,12 @@
 
 namespace GoogleMobileAds.Common
 {
-    public interface IAdManagerInterstitialClient : IInterstitialClient
+    public interface IAdManagerInterstitialClient : IInterstitialBaseClient
     {
         // Ad event fired when the ad sends a message to the application.
         event Action<AppEvent> OnAppEvent;
 
         // Returns the next pre-loaded ad manager interstitial ad and null if no ad is available.
-        IAdManagerInterstitialClient PollAdManagerAd(string adUnitId);
+        IAdManagerInterstitialClient PollAd(string adUnitId);
     }
 }
diff --git a/source/plugin/Assets/GoogleMobileAds/Common/IBannerBaseClient.cs b/source/plugin/Assets/GoogleMobileAds/Common/IBannerBaseClient.cs
new file mode 100644
index 000000000..5c1ff3caa
--- /dev/null
+++ b/source/plugin/Assets/GoogleMobileAds/Common/IBannerBaseClient.cs
@@ -0,0 +1,79 @@
+// Copyright (C) 2015 Google, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+using System;
+
+using GoogleMobileAds.Api;
+
+namespace GoogleMobileAds.Common
+{
+    public interface IBannerBaseClient
+    {
+        // Ad event fired when the banner ad has been received.
+        event EventHandler<EventArgs> OnAdLoaded;
+        // Ad event fired when the banner ad has failed to load.
+        event EventHandler<LoadAdErrorClientEventArgs> OnAdFailedToLoad;
+        // Ad event fired when the banner ad is opened.
+        event EventHandler<EventArgs> OnAdOpening;
+        // Ad event fired when the banner ad is closed.
+        event EventHandler<EventArgs> OnAdClosed;
+        // Ad event fired when the banner ad is estimated to have earned money.
+        event Action<AdValue> OnPaidEvent;
+        // Ad event fired when the banner ad is clicked.
+        event Action OnAdClicked;
+        // Ad event fired when the banner ad records an impression.
+        event Action OnAdImpressionRecorded;
+
+        // Creates a banner view and adds it to the view hierarchy.
+        void CreateBannerView(string adUnitId, AdSize adSize, AdPosition position);
+
+        // Creates a banner view and adds it to the view hierarchy with a custom position.
+        void CreateBannerView(string adUnitId, AdSize adSize, int x, int y);
+
+        // Requests a new ad for the banner view.
+        void LoadAd(AdRequest request);
+
+        // Shows the banner view on the screen.
+        void ShowBannerView();
+
+        // Hides the banner view from the screen.
+        void HideBannerView();
+
+        // Destroys a banner view.
+        void DestroyBannerView();
+
+        /// Returns the ad unit ID.
+        string GetAdUnitID();
+
+        // Returns the height of the BannerView in pixels.
+        float GetHeightInPixels();
+
+        // Returns the width of the BannerView in pixels.
+        float GetWidthInPixels();
+
+        // Set the position of the banner view using standard position.
+        void SetPosition(AdPosition adPosition);
+
+        // Set the position of the banner view using custom position.
+        void SetPosition(int x, int y);
+
+        // Indicates whether the last loaded ad is a collapsible banner.
+        bool IsCollapsible();
+
+        // Returns ad request Response info client.
+        IResponseInfoClient GetResponseInfoClient();
+
+
+    }
+}
diff --git a/source/plugin/Assets/GoogleMobileAds/Common/IBannerClient.cs b/source/plugin/Assets/GoogleMobileAds/Common/IBannerClient.cs
index 336c99367..8bd7c9860 100644
--- a/source/plugin/Assets/GoogleMobileAds/Common/IBannerClient.cs
+++ b/source/plugin/Assets/GoogleMobileAds/Common/IBannerClient.cs
@@ -18,62 +18,5 @@
 
 namespace GoogleMobileAds.Common
 {
-    public interface IBannerClient
-    {
-        // Ad event fired when the banner ad has been received.
-        event EventHandler<EventArgs> OnAdLoaded;
-        // Ad event fired when the banner ad has failed to load.
-        event EventHandler<LoadAdErrorClientEventArgs> OnAdFailedToLoad;
-        // Ad event fired when the banner ad is opened.
-        event EventHandler<EventArgs> OnAdOpening;
-        // Ad event fired when the banner ad is closed.
-        event EventHandler<EventArgs> OnAdClosed;
-        // Ad event fired when the banner ad is estimated to have earned money.
-        event Action<AdValue> OnPaidEvent;
-        // Ad event fired when the banner ad is clicked.
-        event Action OnAdClicked;
-        // Ad event fired when the banner ad records an impression.
-        event Action OnAdImpressionRecorded;
-
-        // Creates a banner view and adds it to the view hierarchy.
-        void CreateBannerView(string adUnitId, AdSize adSize, AdPosition position);
-
-        // Creates a banner view and adds it to the view hierarchy with a custom position.
-        void CreateBannerView(string adUnitId, AdSize adSize, int x, int y);
-
-        // Requests a new ad for the banner view.
-        void LoadAd(AdRequest request);
-
-        // Shows the banner view on the screen.
-        void ShowBannerView();
-
-        // Hides the banner view from the screen.
-        void HideBannerView();
-
-        // Destroys a banner view.
-        void DestroyBannerView();
-
-        /// Returns the ad unit ID.
-        string GetAdUnitID();
-
-        // Returns the height of the BannerView in pixels.
-        float GetHeightInPixels();
-
-        // Returns the width of the BannerView in pixels.
-        float GetWidthInPixels();
-
-        // Set the position of the banner view using standard position.
-        void SetPosition(AdPosition adPosition);
-
-        // Set the position of the banner view using custom position.
-        void SetPosition(int x, int y);
-
-        // Indicates whether the last loaded ad is a collapsible banner.
-        bool IsCollapsible();
-
-        // Returns ad request Response info client.
-        IResponseInfoClient GetResponseInfoClient();
-
-
-    }
+    public interface IBannerClient : IBannerBaseClient { }
 }
diff --git a/source/plugin/Assets/GoogleMobileAds/Common/IInterstitialBaseClient.cs b/source/plugin/Assets/GoogleMobileAds/Common/IInterstitialBaseClient.cs
new file mode 100644
index 000000000..ec1e32d28
--- /dev/null
+++ b/source/plugin/Assets/GoogleMobileAds/Common/IInterstitialBaseClient.cs
@@ -0,0 +1,62 @@
+// Copyright 2015-2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+using System;
+
+using GoogleMobileAds.Api;
+using GoogleMobileAds.Api.AdManager;
+
+namespace GoogleMobileAds.Common
+{
+    public interface IInterstitialBaseClient
+    {
+        // Ad event fired when the interstitial ad has been received.
+        event EventHandler<EventArgs> OnAdLoaded;
+        // Ad event fired when the interstitial ad has failed to load.
+        event EventHandler<LoadAdErrorClientEventArgs> OnAdFailedToLoad;
+        // Ad event fired when the interstitial ad is estimated to have earned money.
+        event Action<AdValue> OnPaidEvent;
+        // Ad event fired when the full screen content has failed to be presented.
+        event EventHandler<AdErrorClientEventArgs> OnAdFailedToPresentFullScreenContent;
+        // Ad event fired when the full screen content has been presented.
+        event EventHandler<EventArgs> OnAdDidPresentFullScreenContent;
+        // Ad event fired when the full screen content has been dismissed.
+        event EventHandler<EventArgs> OnAdDidDismissFullScreenContent;
+        // Ad event fired when an ad impression has been recorded.
+        event EventHandler<EventArgs> OnAdDidRecordImpression;
+        // Ad event fired when an ad has been clicked.
+        event Action OnAdClicked;
+
+        // Creates an interstitial ad.
+        void CreateInterstitialAd();
+
+        // Verify if an interstitial ad is preloaded and is available to show.
+        bool IsAdAvailable(string adUnitId);
+
+        // Loads an interstitial ad.
+        void LoadAd(string adUnitID, AdRequest request);
+
+        // Shows the interstitial ad on the screen.
+        void Show();
+
+        // Returns the ad unit ID.
+        string GetAdUnitID();
+
+        // Returns ad request Response info client.
+        IResponseInfoClient GetResponseInfoClient();
+
+        // Destroys the interstitial ad.
+        void DestroyInterstitial();
+    }
+}
diff --git a/source/plugin/Assets/GoogleMobileAds/Common/IInterstitialClient.cs b/source/plugin/Assets/GoogleMobileAds/Common/IInterstitialClient.cs
index 3d9e1e766..7833f73e5 100644
--- a/source/plugin/Assets/GoogleMobileAds/Common/IInterstitialClient.cs
+++ b/source/plugin/Assets/GoogleMobileAds/Common/IInterstitialClient.cs
@@ -19,47 +19,9 @@
 
 namespace GoogleMobileAds.Common
 {
-    public interface IInterstitialClient
+    public interface IInterstitialClient: IInterstitialBaseClient
     {
-        // Ad event fired when the interstitial ad has been received.
-        event EventHandler<EventArgs> OnAdLoaded;
-        // Ad event fired when the interstitial ad has failed to load.
-        event EventHandler<LoadAdErrorClientEventArgs> OnAdFailedToLoad;
-        // Ad event fired when the interstitial ad is estimated to have earned money.
-        event Action<AdValue> OnPaidEvent;
-        // Ad event fired when the full screen content has failed to be presented.
-        event EventHandler<AdErrorClientEventArgs> OnAdFailedToPresentFullScreenContent;
-        // Ad event fired when the full screen content has been presented.
-        event EventHandler<EventArgs> OnAdDidPresentFullScreenContent;
-        // Ad event fired when the full screen content has been dismissed.
-        event EventHandler<EventArgs> OnAdDidDismissFullScreenContent;
-        // Ad event fired when an ad impression has been recorded.
-        event EventHandler<EventArgs> OnAdDidRecordImpression;
-        // Ad event fired when an ad has been clicked.
-        event Action OnAdClicked;
-
-        // Creates an interstitial ad.
-        void CreateInterstitialAd();
-
-        // Verify if an interstitial ad is preloaded and is available to show.
-        bool IsAdAvailable(string adUnitId);
-
         // Returns the next pre-loaded interstitial ad and null if no ad is available.
         IInterstitialClient PollAd(string adUnitId);
-
-        // Loads an interstitial ad.
-        void LoadAd(string adUnitID, AdRequest request);
-
-        // Shows the interstitial ad on the screen.
-        void Show();
-
-        // Returns the ad unit ID.
-        string GetAdUnitID();
-
-        // Returns ad request Response info client.
-        IResponseInfoClient GetResponseInfoClient();
-
-        // Destroys the interstitial ad.
-        void DestroyInterstitial();
     }
 }
diff --git a/source/plugin/Assets/GoogleMobileAds/Platforms/Android/AdManagerInterstitialClient.cs b/source/plugin/Assets/GoogleMobileAds/Platforms/Android/AdManagerInterstitialClient.cs
index 67b5324e8..3f23bd64e 100644
--- a/source/plugin/Assets/GoogleMobileAds/Platforms/Android/AdManagerInterstitialClient.cs
+++ b/source/plugin/Assets/GoogleMobileAds/Platforms/Android/AdManagerInterstitialClient.cs
@@ -66,12 +66,7 @@ public bool IsAdAvailable(string adUnitId)
             return this._androidAdmanagerInterstitialAd.Call<bool>("isAdAvailable", adUnitId);
         }
 
-        public IInterstitialClient PollAd(string adUnitId)
-        {
-            return PollAdManagerAd(adUnitId);
-        }
-
-        public IAdManagerInterstitialClient PollAdManagerAd(string adUnitId)
+        public IAdManagerInterstitialClient PollAd(string adUnitId)
         {
             this._androidAdmanagerInterstitialAd.Call("pollAd", adUnitId);
             return this;
diff --git a/source/plugin/Assets/GoogleMobileAds/Platforms/Unity/AdManagerInterstitialClient.cs b/source/plugin/Assets/GoogleMobileAds/Platforms/Unity/AdManagerInterstitialClient.cs
index cf51c4eec..8cffabc6f 100644
--- a/source/plugin/Assets/GoogleMobileAds/Platforms/Unity/AdManagerInterstitialClient.cs
+++ b/source/plugin/Assets/GoogleMobileAds/Platforms/Unity/AdManagerInterstitialClient.cs
@@ -24,7 +24,7 @@ public class AdManagerInterstitialClient : InterstitialClient, IAdManagerInterst
     {
         public event Action<AppEvent> OnAppEvent;
 
-        public IAdManagerInterstitialClient PollAdManagerAd(string adUnitId)
+        public IAdManagerInterstitialClient PollAd(string adUnitId)
         {
             Debug.Log("Preloaded ads are not supported on the Unity editor platform.");
             return new AdManagerInterstitialClient();
diff --git a/source/plugin/Assets/GoogleMobileAds/Platforms/iOS/AdManagerInterstitialClient.cs b/source/plugin/Assets/GoogleMobileAds/Platforms/iOS/AdManagerInterstitialClient.cs
index 8f50733e6..0ac9ee0cc 100644
--- a/source/plugin/Assets/GoogleMobileAds/Platforms/iOS/AdManagerInterstitialClient.cs
+++ b/source/plugin/Assets/GoogleMobileAds/Platforms/iOS/AdManagerInterstitialClient.cs
@@ -126,14 +126,8 @@ public bool IsAdAvailable(string adUnitId)
             return Externs.GAMUInterstitialIsPreloadedAdAvailable(adUnitId);
         }
 
-        // Returns the next pre-loaded interstitial ad and null if no ad is available.
-        public IInterstitialClient PollAd(string adUnitId)
-        {
-            return PollAdManagerAd(adUnitId);
-        }
-
         // Returns the next pre-loaded ad manager interstitial ad and null if no ad is available.
-        public IAdManagerInterstitialClient PollAdManagerAd(string adUnitId)
+        public IAdManagerInterstitialClient PollAd(string adUnitId)
         {
             Externs.GAMUInterstitialPreloadedAdWithAdUnitID(this.InterstitialPtr, adUnitId);
             return this;