diff --git a/Assets/MobileServices/client/MobileServiceClient.cs b/Assets/MobileServices/client/MobileServiceClient.cs
index 0b1de10..5681e71 100644
--- a/Assets/MobileServices/client/MobileServiceClient.cs
+++ b/Assets/MobileServices/client/MobileServiceClient.cs
@@ -3,6 +3,11 @@
 using RestSharp;
 using System.Collections.Generic;
 using System;
+#if !NETFX_CORE || UNITY_ANDROID
+using System.Net;
+using System.Security.Cryptography.X509Certificates;
+using System.Net.Security;
+#endif
 
 namespace Unity3dAzure.MobileServices
 {
@@ -22,6 +27,12 @@ public MobileServiceClient(string appUrl, string appKey) : base(appUrl)
         {
             AppUrl = appUrl;
             AppKey = appKey;
+
+            // required for running in Windows and Android
+            #if !NETFX_CORE || UNITY_ANDROID
+            Debug.Log("ServerCertificateValidation");
+            ServicePointManager.ServerCertificateValidationCallback = RemoteCertificateValidationCallback;    
+            #endif
         }
 
         public override string ToString()
@@ -41,7 +52,7 @@ public void Login(MobileServiceAuthenticationProvider provider, string token, Ac
         {
             string uri = "login/" + provider.ToString().ToLower();
             ZumoRequest request = new ZumoRequest(this, uri, Method.POST);
-            Debug.Log( "Login Request Uri: " + uri );
+            Debug.Log("Login Request Uri: " + uri + " access token: " + token);
             request.AddBodyAccessToken(token);
             this.ExecuteAsync(request, callback);
         }
@@ -67,5 +78,20 @@ public void Login(MobileServiceAuthenticationProvider provider)
             this.ExecuteAsync(request, callback);
         }
 
+        #if !NETFX_CORE || UNITY_ANDROID
+        private bool RemoteCertificateValidationCallback(System.Object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
+        {
+            //   Check the certificate to see if it was issued from Azure
+            if (certificate.Subject.Contains("azurewebsites.net"))
+            {
+                return true;
+            }
+            else
+            {
+                return false;
+            }
+        }
+        #endif
+
     }
 }
\ No newline at end of file
diff --git a/Assets/MobileServices/http/ZumoRequest.cs b/Assets/MobileServices/http/ZumoRequest.cs
index 326a7eb..83f23ad 100644
--- a/Assets/MobileServices/http/ZumoRequest.cs
+++ b/Assets/MobileServices/http/ZumoRequest.cs
@@ -1,11 +1,6 @@
 using UnityEngine;
 using System.Collections;
 using RestSharp;
-#if !NETFX_CORE
-using System.Net;
-using System.Security.Cryptography.X509Certificates;
-using System.Net.Security;
-#endif
 
 namespace Unity3dAzure.MobileServices
 {
@@ -22,10 +17,6 @@ public ZumoRequest(MobileServiceClient client, string uri, Method httpMethod) :
                 this.AddHeader("X-ZUMO-AUTH", client.User.authenticationToken);
                 Debug.Log("Auth UserId:" + client.User.user.userId);
             }
-            // required for running in Windows
-            #if !NETFX_CORE
-            ServicePointManager.ServerCertificateValidationCallback = RemoteCertificateValidationCallback;
-            #endif
         }
 
         public void AddBodyAccessToken(string token)
@@ -34,20 +25,5 @@ public void AddBodyAccessToken(string token)
             this.AddBody(accessToken);
         }
 
-        #if !NETFX_CORE
-        private bool RemoteCertificateValidationCallback(System.Object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
-        {
-            //   Check the certificate to see if it was issued from Azure
-            if ( certificate.Subject.Contains("azurewebsites.net") )
-            {
-                return true;
-            }
-            else
-            {
-                return false;
-            }
-        }
-        #endif
-
     }
 }
diff --git a/Assets/MobileServices/model/AccessToken.cs b/Assets/MobileServices/model/AccessToken.cs
index 7f43cbb..6bf97bd 100644
--- a/Assets/MobileServices/model/AccessToken.cs
+++ b/Assets/MobileServices/model/AccessToken.cs
@@ -11,5 +11,8 @@ public AccessToken(string accessTokenValue)
 		{
 			access_token = accessTokenValue;
 		}
+
+        /// Needed only for Serialization (Fixes error: AccessToken cannot be serialized. Consider marking it with the DataContractAttribute attribute, and marking all of its members you want serialized with the DataMemberAttribute attribute)
+        public AccessToken() {}
     }
 }
\ No newline at end of file
diff --git a/Assets/Scenes/HighscoresDemo.unity b/Assets/Scenes/HighscoresDemo.unity
index 1cca4e0..378a8c2 100644
Binary files a/Assets/Scenes/HighscoresDemo.unity and b/Assets/Scenes/HighscoresDemo.unity differ
diff --git a/Assets/Scripts/HighscoresDemoUI.cs b/Assets/Scripts/HighscoresDemoUI.cs
index 99358ad..7d879f6 100644
--- a/Assets/Scripts/HighscoresDemoUI.cs
+++ b/Assets/Scripts/HighscoresDemoUI.cs
@@ -37,13 +37,7 @@ public class HighscoresDemoUI : MonoBehaviour
 	
 	/// Use this for initialization
 	void Start () 
-	{
-		/// NB: Warning this block disables ServerCertificateValidation on Android for demo purposes only!
-		#if UNITY_ANDROID
-			Debug.Log("Warning: Android ServerCertificateValidation disabled.");
-			ServicePointManager.ServerCertificateValidationCallback = (p1, p2, p3, p4) => true; // NB: this is a workaround for "Unable to find /System/Library/Frameworks/Security.framework/Security" issue in Android
-		#endif
-		
+	{	
 		/// Create Mobile Service client
 		_client = new MobileServiceClient(_appUrl, _appKey);
 		Debug.Log(_client);
diff --git a/ProjectSettings/ProjectSettings.asset b/ProjectSettings/ProjectSettings.asset
index 3121c44..0e1c4a0 100644
Binary files a/ProjectSettings/ProjectSettings.asset and b/ProjectSettings/ProjectSettings.asset differ