diff --git a/YavscLib/IGoogleCloudMobileDeclaration.cs b/YavscLib/IGoogleCloudMobileDeclaration.cs
index b8b006b5..24ca24e0 100644
--- a/YavscLib/IGoogleCloudMobileDeclaration.cs
+++ b/YavscLib/IGoogleCloudMobileDeclaration.cs
@@ -27,7 +27,7 @@ namespace Yavsc.Models.Identity
         string Model { get; set; }
         string Platform { get; set; }
         string Version { get; set; }
-        DateTime LatestActivityUpdate { get; set; }
+        DateTime? LatestActivityUpdate { get; set; }
     }
 
     public interface IGoogleCloudMobileDeclaration: IGCMDeclaration
diff --git a/ZicMoove/ZicMoove.Droid/MainActivity.cs b/ZicMoove/ZicMoove.Droid/MainActivity.cs
index a47ae3ee..d0b4f766 100644
--- a/ZicMoove/ZicMoove.Droid/MainActivity.cs
+++ b/ZicMoove/ZicMoove.Droid/MainActivity.cs
@@ -280,38 +280,6 @@ namespace ZicMoove.Droid
                 return true;
             }
         }
-        public void UploadJson(string data)
-        {
-            try
-            {
-                string url = "http://lua.pschneider.fr/api/BackOffice/SetRegistrationId";
-                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
-                request.Method = "POST";
-                //using GET - request.Headers.Add ("Authorization","Authorizaation value");
-                request.ContentType = "application/json";
-                HttpWebResponse myResp = (HttpWebResponse)request.GetResponse();
-                string responseText;
-
-                using (var response = request.GetResponse())
-                {
-                    using (var reader = new StreamReader(response.GetResponseStream()))
-                    {
-                        responseText = reader.ReadToEnd();
-                        Log.Debug(Constants.ApplicationName, responseText);
-                    }
-                }
-            }
-
-            catch (WebException exception)
-            {
-                string responseText;
-                using (var reader = new StreamReader(exception.Response.GetResponseStream()))
-                {
-                    responseText = reader.ReadToEnd();
-                    Log.Debug("ZicMoove", responseText);
-                }
-            }
-        }
 
         public async Task<IEnumerable<Account>> GetAndroidAccounts()
         {
diff --git a/ZicMoove/ZicMoove.Droid/ZicMoove.Droid.csproj b/ZicMoove/ZicMoove.Droid/ZicMoove.Droid.csproj
index 1c08e1df..bf6109ec 100644
--- a/ZicMoove/ZicMoove.Droid/ZicMoove.Droid.csproj
+++ b/ZicMoove/ZicMoove.Droid/ZicMoove.Droid.csproj
@@ -550,9 +550,11 @@
     </PropertyGroup>
     <Error Condition="!Exists('..\..\packages\Xamarin.Android.Support.Vector.Drawable.23.3.0\build\Xamarin.Android.Support.Vector.Drawable.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Xamarin.Android.Support.Vector.Drawable.23.3.0\build\Xamarin.Android.Support.Vector.Drawable.targets'))" />
     <Error Condition="!Exists('..\..\packages\Xamarin.Forms.2.3.2.127\build\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10\Xamarin.Forms.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Xamarin.Forms.2.3.2.127\build\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10\Xamarin.Forms.targets'))" />
+    <Error Condition="!Exists('..\..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets'))" />
   </Target>
   <Import Project="..\..\packages\Xamarin.Android.Support.Vector.Drawable.23.3.0\build\Xamarin.Android.Support.Vector.Drawable.targets" Condition="Exists('..\..\packages\Xamarin.Android.Support.Vector.Drawable.23.3.0\build\Xamarin.Android.Support.Vector.Drawable.targets')" />
   <Import Project="..\..\packages\Xamarin.Forms.2.3.2.127\build\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10\Xamarin.Forms.targets" Condition="Exists('..\..\packages\Xamarin.Forms.2.3.2.127\build\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10\Xamarin.Forms.targets')" />
+  <Import Project="..\..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets" Condition="Exists('..\..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets')" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
      Other similar extension points exist, see Microsoft.Common.targets.
   <Target Name="BeforeBuild">
diff --git a/ZicMoove/ZicMoove.Droid/packages.config b/ZicMoove/ZicMoove.Droid/packages.config
index d984302c..92367125 100644
--- a/ZicMoove/ZicMoove.Droid/packages.config
+++ b/ZicMoove/ZicMoove.Droid/packages.config
@@ -2,6 +2,7 @@
 <packages>
   <package id="ExifLib.PCL" version="1.0.1" targetFramework="monoandroid70" />
   <package id="MarkdownDeep-av.NET" version="1.5.2" targetFramework="monoandroid60" />
+  <package id="Microsoft.Bcl.Build" version="1.0.21" targetFramework="monoandroid70" />
   <package id="Newtonsoft.Json" version="9.0.1" targetFramework="monoandroid60" />
   <package id="Plugin.CurrentActivity" version="1.0.1" targetFramework="monoandroid70" />
   <package id="Plugin.Permissions" version="1.1.7" targetFramework="monoandroid70" />
diff --git a/ZicMoove/ZicMoove/App.xaml.cs b/ZicMoove/ZicMoove/App.xaml.cs
index 18dc82ae..77fb061d 100644
--- a/ZicMoove/ZicMoove/App.xaml.cs
+++ b/ZicMoove/ZicMoove/App.xaml.cs
@@ -454,6 +454,11 @@ namespace ZicMoove
         public static IGCMDeclaration GetDeviceInfo()
         {
             var devinfo = CrossDeviceInfo.Current;
+            DateTime? lupdate = DataManager.Instance.Activities.Count > 0 ?
+                DataManager.Instance.Activities.Aggregate(
+                    (a, b) => a.DateModified > b.DateModified ? a : b
+                    ).DateModified : (DateTime ?) null;
+
             return new GCMRegIdDeclaration
             {
                 DeviceId = devinfo.Id,
@@ -461,9 +466,7 @@ namespace ZicMoove
                 Model = devinfo.Model,
                 Platform = devinfo.Platform.ToString(),
                 Version = devinfo.Version,
-                LatestActivityUpdate = DataManager.Instance.Activities.Aggregate(
-                    (a,b)=> a.DateModified > b.DateModified ? a : b
-                    ).DateModified
+                LatestActivityUpdate = lupdate
             };
         }
 
diff --git a/ZicMoove/ZicMoove/Interfaces/IPlatform.cs b/ZicMoove/ZicMoove/Interfaces/IPlatform.cs
index 04955a36..0ac32e14 100644
--- a/ZicMoove/ZicMoove/Interfaces/IPlatform.cs
+++ b/ZicMoove/ZicMoove/Interfaces/IPlatform.cs
@@ -11,8 +11,6 @@ namespace ZicMoove.Interfaces
         
         // TODO Better
 		string GCMStatusMessage { get; }
-
-        bool EnablePushNotifications (bool enable);
         
         void AddAccount();
         
diff --git a/ZicMoove/ZicMoove/Model/Auth/GCRegIdDeclaration.cs b/ZicMoove/ZicMoove/Model/Auth/GCRegIdDeclaration.cs
index cb9c2163..2bd59fe7 100644
--- a/ZicMoove/ZicMoove/Model/Auth/GCRegIdDeclaration.cs
+++ b/ZicMoove/ZicMoove/Model/Auth/GCRegIdDeclaration.cs
@@ -15,7 +15,7 @@ namespace ZicMoove.Model.Auth
         public string GCMRegistrationId
         { get; set; }
 
-        public DateTime LatestActivityUpdate
+        public DateTime? LatestActivityUpdate
         { get; set; }
 
         public string Model
diff --git a/ZicMoove/ZicMoove/Pages/HomePage.xaml b/ZicMoove/ZicMoove/Pages/HomePage.xaml
index 7d27ab7d..e1b388b7 100644
--- a/ZicMoove/ZicMoove/Pages/HomePage.xaml
+++ b/ZicMoove/ZicMoove/Pages/HomePage.xaml
@@ -1,11 +1,11 @@
 <?xml version="1.0" encoding="utf-8" ?>
-<TabbedPage xmlns="http://xamarin.com/schemas/2014/forms"
+<CarouselPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:local="clr-namespace:ZicMoove;assembly=ZicMoove"
             x:Class="ZicMoove.Pages.HomePage"
             Style="{StaticResource PageStyle}"
             Title="Accueil">
-  <ContentPage.Resources>
+  <CarouselPage.Resources>
     <ResourceDictionary>
       <Style TargetType="Label">
         <Setter Property="Style" Value="{StaticResource ContentLabelStyle}" />
@@ -14,12 +14,11 @@
         <Setter Property="Style" Value="{StaticResource ButtonStyle}" />
       </Style>
     </ResourceDictionary>
-  </ContentPage.Resources>
+  </CarouselPage.Resources>
 
-  <TabbedPage.Children>
     <!-- La recherche d'un pro    -->
-    <TabbedPage Title="{x:Static local:Strings.SearchForAPro}" >
-    </TabbedPage>
+    <ContentPage Title="{x:Static local:Strings.SearchForAPro}" >
+    </ContentPage>
 
     <!-- 
   les derniers sons/videos/articles postés  
@@ -98,6 +97,5 @@
         <Button x:Name="btn_cli_pub" HorizontalOptions="End" VerticalOptions="Start"  Text="Chercher"/>
       </StackLayout>
     </ContentPage>
-  </TabbedPage.Children>
 
-</TabbedPage>
\ No newline at end of file
+</CarouselPage>
\ No newline at end of file