diff --git a/CompassVO/AboutPage.xaml b/CompassVO/AboutPage.xaml
index 3129cd4..0d7308b 100644
--- a/CompassVO/AboutPage.xaml
+++ b/CompassVO/AboutPage.xaml
@@ -6,7 +6,7 @@
                             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
                             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
                             xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
-                            xmlns:GalaSoft_MvvmLight_Command="clr-namespace:GalaSoft.MvvmLight.Command;assembly=GalaSoft.MvvmLight.Extras.WP71"
+                            xmlns:GalaSoft_MvvmLight_Command="clr-namespace:GalaSoft.MvvmLight.Command;assembly=GalaSoft.MvvmLight.Platform"
                             FontFamily="{StaticResource PhoneFontFamilyNormal}"
                             FontSize="{StaticResource PhoneFontSizeNormal}"
                             Foreground="{StaticResource PhoneForegroundBrush}"
@@ -114,16 +114,4 @@
       </StackPanel>
     </Grid>
   </Grid>
-
-  <!--Sample code showing usage of ApplicationBar-->
-  <!--<phone:PhoneApplicationPage.ApplicationBar>
-        <shell:ApplicationBar IsVisible="True" IsMenuEnabled="True">
-            <shell:ApplicationBarIconButton IconUri="/Images/appbar_button1.png" Text="Button 1" />
-            <shell:ApplicationBarIconButton IconUri="/Images/appbar_button2.png" Text="Button 2" />
-            <shell:ApplicationBar.MenuItems>
-                <shell:ApplicationBarMenuItem Text="MenuItem 1" />
-                <shell:ApplicationBarMenuItem Text="MenuItem 2" />
-            </shell:ApplicationBar.MenuItems>
-        </shell:ApplicationBar>
-    </phone:PhoneApplicationPage.ApplicationBar>-->
 </phone:PhoneApplicationPage>
\ No newline at end of file
diff --git a/CompassVO/CompassVO.csproj b/CompassVO/CompassVO.csproj
index c2f6d04..f412b6c 100644
--- a/CompassVO/CompassVO.csproj
+++ b/CompassVO/CompassVO.csproj
@@ -103,19 +103,30 @@
     <Reference Include="Coding4Fun.Phone.Controls.Toolkit">
       <HintPath>..\packages\Coding4Fun.Phone.Controls.Complete.1.4.6\lib\Coding4Fun.Phone.Controls.Toolkit.dll</HintPath>
     </Reference>
-    <Reference Include="GalaSoft.MvvmLight.Extras.WP71, Version=0.0.0.0, Culture=neutral, processorArchitecture=MSIL" />
-    <Reference Include="GalaSoft.MvvmLight.WP71, Version=0.0.0.0, Culture=neutral, processorArchitecture=MSIL" />
-    <Reference Include="MicroIoc">
-      <HintPath>..\packages\microioc.1.0\lib\MicroIoc.dll</HintPath>
+    <Reference Include="GalaSoft.MvvmLight, Version=5.3.0.19026, Culture=neutral, PublicKeyToken=e7570ab207bcb616, processorArchitecture=MSIL">
+      <HintPath>..\packages\MvvmLightLibs.5.3.0.0\lib\wp8\GalaSoft.MvvmLight.dll</HintPath>
+    </Reference>
+    <Reference Include="GalaSoft.MvvmLight.Extras, Version=5.3.0.19032, Culture=neutral, PublicKeyToken=669f0b5e8f868abf, processorArchitecture=MSIL">
+      <HintPath>..\packages\MvvmLightLibs.5.3.0.0\lib\wp8\GalaSoft.MvvmLight.Extras.dll</HintPath>
+    </Reference>
+    <Reference Include="GalaSoft.MvvmLight.Platform, Version=5.3.0.19033, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\MvvmLightLibs.5.3.0.0\lib\wp8\GalaSoft.MvvmLight.Platform.dll</HintPath>
+    </Reference>
+    <Reference Include="MicroIoc, Version=0.2.0.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\microioc.2.0\lib\portable-win+net40+sl40+wp\MicroIoc.dll</HintPath>
     </Reference>
     <Reference Include="Microsoft.Phone.Controls, Version=8.0.0.0, Culture=neutral, PublicKeyToken=24eec0d8c86cda1e, processorArchitecture=MSIL" />
     <Reference Include="Microsoft.Phone.Controls.Toolkit, Version=7.0.0.0, Culture=neutral, PublicKeyToken=b772ad94eb9ca604, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
       <HintPath>..\packages\SilverlightToolkitWP.4.2011.8.17\lib\sl4-windowsphone71\Microsoft.Phone.Controls.Toolkit.dll</HintPath>
     </Reference>
-    <Reference Include="System.Windows.Interactivity, Version=3.8.5.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL" />
-    <Reference Include="Telerik.Windows.Controls.Primitives, Version=2011.3.817.1040, Culture=neutral, PublicKeyToken=5803cfa389c90ce7" />
-    <Reference Include="Telerik.Windows.Core, Version=2011.3.817.1040, Culture=neutral, PublicKeyToken=5803cfa389c90ce7" />
+    <Reference Include="Microsoft.Practices.ServiceLocation, Version=1.3.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\packages\CommonServiceLocator.1.3\lib\portable-net4+sl5+netcore45+wpa81+wp8\Microsoft.Practices.ServiceLocation.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Windows.Interactivity, Version=3.9.5.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\packages\MvvmLightLibs.5.3.0.0\lib\wp8\System.Windows.Interactivity.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="AboutPage.xaml.cs">
@@ -231,7 +242,9 @@
   </ItemGroup>
   <ItemGroup>
     <None Include="app.config" />
-    <None Include="packages.config" />
+    <None Include="packages.config">
+      <SubType>Designer</SubType>
+    </None>
     <None Include="Properties\AppManifest.xml" />
     <None Include="Properties\WMAppManifest.xml">
       <SubType>Designer</SubType>
diff --git a/CompassVO/MainPage.xaml b/CompassVO/MainPage.xaml
index b14cc51..d017722 100644
--- a/CompassVO/MainPage.xaml
+++ b/CompassVO/MainPage.xaml
@@ -1,29 +1,28 @@
-<phone:PhoneApplicationPage xmlns:telerikPrimitives="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Primitives"
-                            x:Class="CompassVO.MainPage"
-                            xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-                            xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-                            xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
-                            xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
-                            xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
-                            xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-                            xmlns:Preview="clr-namespace:Phone7.Fx.Preview;assembly=Phone7.Fx.Preview"
-                            xmlns:compass_orienteering="clr-namespace:CompassVO.Themes.compass_orienteering"
-                            xmlns:Views="clr-namespace:CompassVO.Views"
-                            xmlns:GalaSoft_MvvmLight_Command="clr-namespace:GalaSoft.MvvmLight.Command;assembly=GalaSoft.MvvmLight.Extras.WP71"
-                            xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
-                            xmlns:toolkit="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone.Controls.Toolkit"
-                            mc:Ignorable="d"
-                            d:DesignWidth="480"
-                            d:DesignHeight="768"
-                            FontFamily="{StaticResource PhoneFontFamilyNormal}"
-                            FontSize="{StaticResource PhoneFontSizeNormal}"
-                            Foreground="{StaticResource PhoneForegroundBrush}"
-                            SupportedOrientations="Portrait"
-                            Orientation="Portrait"
-                            shell:SystemTray.IsVisible="True"
-                            Unloaded="PhoneApplicationPage_Unloaded"
-                            DataContext="{Binding Main, Source={StaticResource Locator}}"
-                            BackKeyPress="PhoneApplicationPage_BackKeyPress">
+<phone:PhoneApplicationPage
+    x:Class="CompassVO.MainPage"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
+    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    xmlns:Preview="clr-namespace:Phone7.Fx.Preview;assembly=Phone7.Fx.Preview"
+    xmlns:Views="clr-namespace:CompassVO.Views"
+    xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
+    xmlns:toolkit="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone.Controls.Toolkit"
+    xmlns:GalaSoft_MvvmLight_Command="clr-namespace:GalaSoft.MvvmLight.Command;assembly=GalaSoft.MvvmLight.Platform"
+    mc:Ignorable="d"
+    d:DesignWidth="480"
+    d:DesignHeight="768"
+    FontFamily="{StaticResource PhoneFontFamilyNormal}"
+    FontSize="{StaticResource PhoneFontSizeNormal}"
+    Foreground="{StaticResource PhoneForegroundBrush}"
+    SupportedOrientations="Portrait"
+    Orientation="Portrait"
+    shell:SystemTray.IsVisible="True"
+    Unloaded="PhoneApplicationPage_Unloaded"
+    DataContext="{Binding Main, Source={StaticResource Locator}}"
+    BackKeyPress="PhoneApplicationPage_BackKeyPress">
 
   <i:Interaction.Triggers>
     <i:EventTrigger EventName="Loaded">
@@ -113,43 +112,6 @@
 
       <Grid x:Name="compassContainer"
                   Opacity="{Binding CompasUIOpacity}">
-        <!--<compass_orienteering:compass_orienteering />-->
-        <!--<StackPanel Orientation="Horizontal">
-                <TextBlock x:Name="lblAngleMagnetic"
-                           FontSize="28"
-                           Margin="6">Angle magnetic:</TextBlock>
-                <TextBlock x:Name="lblAngleMagneticValue"
-                           Margin="6"
-                           FontSize="28"
-                           Text="{Binding Path=MagneticHeading, Mode=OneWay, StringFormat='0'}" />
-            </StackPanel>
-            <StackPanel Orientation="Horizontal">
-                <TextBlock x:Name="lblAngleTrue"
-                           FontSize="28"
-                           Margin="6">Angle true:</TextBlock>
-                <TextBlock x:Name="lblAngleTrueValue"
-                           Margin="6"
-                           FontSize="28"
-                           Text="{Binding Path=TrueHeading, Mode=OneWay, StringFormat='0'}" />
-            </StackPanel>
-            <StackPanel Orientation="Horizontal">
-                <TextBlock x:Name="lblAngleMD"
-                           FontSize="28"
-                           Margin="6">Magnetic declination:</TextBlock>
-                <TextBlock x:Name="lblAngleMDValue"
-                           Margin="6"
-                           FontSize="28"
-                           Text="{Binding Path=MagneticDeclination, Mode=OneWay}" />
-            </StackPanel>
-            <StackPanel Orientation="Horizontal">
-                <TextBlock x:Name="lblAccuracy"
-                           FontSize="28"
-                           Margin="6">Accuracy:</TextBlock>
-                <TextBlock x:Name="lblAccuracyValue"
-                           Margin="6"
-                           FontSize="28"
-                           Text="{Binding Path=HeadingAccuracy, Mode=OneWay}" />
-            </StackPanel>-->
       </Grid>
 
       <Grid HorizontalAlignment="Stretch"
@@ -203,56 +165,20 @@
     </Grid>
 
     <!--Calibration UI-->
-    <telerikPrimitives:RadWindow x:Name="winCalibration"
-                                     IsFullScreen="True"
-                                     IsOpen="{Binding NeedsCalibration}"
-                                     IsClosedOnBackButton="False"
-                                     IsClosedOnOutsideTap="False">
+    <Grid x:Name="winCalibration"
+        Visibility="{Binding NeedsCalibration,Converter={StaticResource BooleanToVisibilityConverter}}">
       <Border Background="Black">
         <Views:compass_calibration x:Name="pnlCalibration"
                                            Width="380"
                                            Height="600" />
       </Border>
-    </telerikPrimitives:RadWindow>
+    </Grid>
 
     <!--app bar-->
     <Preview:BindableApplicationBar x:Name="AppBar"
                                         BarOpacity="0.8"
                                         IsMenuEnabled="True">
-      <!--<Preview:BindableApplicationBarIconButton Command="{Binding Main.BackPictureEdit, Mode=OneWay, Source={StaticResource Locator}}"
-                                                      IconUri="/Images/icon_background_white.png"
-                                                      IsEnabled="{Binding IsCompassMode}"
-                                                      Text="edit back" />
-            <Preview:BindableApplicationBarIconButton Command="{Binding Main.CompassDialEdit, Mode=OneWay, Source={StaticResource Locator}}"
-                                                      IconUri="/Images/icon_dial_white.png"
-                                                      IsEnabled="{Binding IsCompassMode}"
-                                                      Text="edit dial" />
-            <Preview:BindableApplicationBarIconButton Command="{Binding Main.ShowSettings, Mode=OneWay, Source={StaticResource Locator}}"
-                                                      IconUri="/Images/appbar.feature.settings.rest.png"
-                                                      IsEnabled="{Binding IsCompassMode}"
-                                                      Text="setting" />
-
-            <Preview:BindableApplicationBarIconButton Command="{Binding Main.AcceptDialEdit, Mode=OneWay, Source={StaticResource Locator}}"
-                                                      IconUri="/Images/appbar.check.rest.png"
-                                                      IsEnabled="{Binding IsDialEdit}"
-                                                      Text="accept" />-->
-
-      <!--<Preview:BindableApplicationBar.MenuItems>
-                <Preview:BindableApplicationBarMenuItem  Text="about"
-                                                         Command="{Binding ShowAbout}" />
-            </Preview:BindableApplicationBar.MenuItems>-->
     </Preview:BindableApplicationBar>
   </Grid>
 
-  <!--Sample code showing usage of ApplicationBar-->
-  <!--<phone:PhoneApplicationPage.ApplicationBar>
-        <shell:ApplicationBar IsVisible="True" IsMenuEnabled="True">
-            <shell:ApplicationBarIconButton IconUri="/Images/appbar_button1.png" Text="Button 1" />
-            <shell:ApplicationBarIconButton IconUri="/Images/appbar_button2.png" Text="Button 2" />
-            <shell:ApplicationBar.MenuItems>
-                <shell:ApplicationBarMenuItem Text="MenuItem 1" />
-                <shell:ApplicationBarMenuItem Text="MenuItem 2" />
-            </shell:ApplicationBar.MenuItems>
-        </shell:ApplicationBar>
-    </phone:PhoneApplicationPage.ApplicationBar>-->
 </phone:PhoneApplicationPage>
\ No newline at end of file
diff --git a/CompassVO/SettingsPage.xaml b/CompassVO/SettingsPage.xaml
index 3d1cddd..48ef10f 100644
--- a/CompassVO/SettingsPage.xaml
+++ b/CompassVO/SettingsPage.xaml
@@ -1,4 +1,4 @@
-<phone:PhoneApplicationPage xmlns:telerikPrimitives="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Primitives"
+<phone:PhoneApplicationPage
                             x:Class="CompassVO.SettingsPage"
                             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
@@ -28,10 +28,10 @@
       <controls:PivotItem Header="theme">
         <Grid>
 
-          <telerikPrimitives:RadDataBoundListBox ItemsSource="{Binding Themes, Mode=OneWay}"
-                                                           SelectedItem="{Binding CurrentTheme, Mode=TwoWay}"
-                                                           SelectionChanged="RadDataBoundListBox_SelectionChanged">
-            <telerikPrimitives:RadDataBoundListBox.ItemTemplate>
+          <ListBox ItemsSource="{Binding Themes, Mode=OneWay}"
+                   SelectedItem="{Binding CurrentTheme, Mode=TwoWay}"
+                   SelectionChanged="RadDataBoundListBox_SelectionChanged">
+            <ListBox.ItemTemplate>
               <DataTemplate>
                 <StackPanel Margin="0, 0, 0, 12">
                   <TextBlock
@@ -48,8 +48,8 @@
                   </Button>
                 </StackPanel>
               </DataTemplate>
-            </telerikPrimitives:RadDataBoundListBox.ItemTemplate>
-          </telerikPrimitives:RadDataBoundListBox>
+            </ListBox.ItemTemplate>
+          </ListBox>
         </Grid>
       </controls:PivotItem>
 
@@ -66,15 +66,5 @@
     </controls:Pivot>
   </Grid>
 
-  <!--Sample code showing usage of ApplicationBar-->
-  <!--<phone:PhoneApplicationPage.ApplicationBar>
-        <shell:ApplicationBar IsVisible="True" IsMenuEnabled="True">
-            <shell:ApplicationBarIconButton x:Name="appbar_button1" IconUri="/Images/appbar_button1.png" Text="Button 1" />
-            <shell:ApplicationBarIconButton x:Name="appbar_button2" IconUri="/Images/appbar_button2.png" Text="Button 2" />
-            <shell:ApplicationBar.MenuItems>
-                <shell:ApplicationBarMenuItem x:Name="menuItem1" Text="MenuItem 1" />
-                <shell:ApplicationBarMenuItem x:Name="menuItem2" Text="MenuItem 2" />
-            </shell:ApplicationBar.MenuItems>
-        </shell:ApplicationBar>
-    </phone:PhoneApplicationPage.ApplicationBar>-->
+
 </phone:PhoneApplicationPage>
\ No newline at end of file
diff --git a/CompassVO/ViewModel/MainViewModel.cs b/CompassVO/ViewModel/MainViewModel.cs
index c52ab3a..481bd56 100644
--- a/CompassVO/ViewModel/MainViewModel.cs
+++ b/CompassVO/ViewModel/MainViewModel.cs
@@ -28,6 +28,7 @@ namespace CompassVO.ViewModel
     private double initDialAngleDrag = 0;
     private double startDialAngle = 0;
     private double deltaDialAngle = 0;
+    private bool hadShownWarningCompassSensor;
 
     #region Public Properties
 
@@ -908,7 +909,11 @@ namespace CompassVO.ViewModel
       }
       else
       {
-        MessageBox.Show("Your device doesn't have compass sensor!");
+        if (!hadShownWarningCompassSensor)
+        {
+          hadShownWarningCompassSensor = true;
+          MessageBox.Show("Your device doesn't have compass sensor!");
+        }
       }
     }
 
diff --git a/CompassVO/packages.config b/CompassVO/packages.config
index 79242c2..101dcf5 100644
--- a/CompassVO/packages.config
+++ b/CompassVO/packages.config
@@ -1,7 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="Coding4Fun.Phone.Controls.Complete" version="1.4.6" />
-  <package id="microioc" version="1.0" />
-  <package id="MvvmLight" version="3.0.3" />
+  <package id="CommonServiceLocator" version="1.3" targetFramework="wp8" />
+  <package id="microioc" version="2.0" targetFramework="wp8" />
+  <package id="MvvmLight" version="5.3.0.0" targetFramework="wp8" />
+  <package id="MvvmLightLibs" version="5.3.0.0" targetFramework="wp8" />
   <package id="SilverlightToolkitWP" version="4.2011.8.17" />
 </packages>
\ No newline at end of file