diff --git a/AndroidStudio-Flutter-setup.md b/AndroidStudio-Flutter-setup.md
index c396547..7889fbc 100644
--- a/AndroidStudio-Flutter-setup.md
+++ b/AndroidStudio-Flutter-setup.md
@@ -9,6 +9,7 @@
 - AndroidStudioRoot: c:\
 - AndroidStudioDir: $(AndroidStudioRoot)\AndroidStudio 
 - RSMobileDir: c:\RS-Mobile
+- RSPlatformTools: C:\Users\LOCALWINUSERNAME\AppData\Local\Android\Sdk\platform-tools
 
 ### Steps
 #### Flutter installation
@@ -103,8 +104,23 @@ Now your project - this is to do in any new project - is able to define and use
     - cmd: flutter devices<return> should no list your mobile as availabel 
 
 # Run the apk on mobile
-1. load the service apk to the mobile and start it
-2. cmd: flutter run [[--release]]<return>  
+## Install the service apk on the mobile
+### a) physical mobile
+1. plug in the USB of the phone
+2. activate: USB-usage file transfer
+3. load the service apk to the mobile and install it
+
+### b) emulated phone (but not only)
+1. For your convenience:  
+   Add in environment variables for your account to the PATH-variable of USER context separated by ';' the explicit full path to the command_tools: $(RSPlatformTools) where the adb.exe houses which we will need.
+2. Open a cmd-console within the directory of your service apk
+3. type in cmd:  
+   adb install "YOUR_SERVCIE_APK.apk" <return>
+
+## Run the RestroShare Mobile
+
+type in cmd console:  
+flutter run [[--release]]<return>  
 without release it gets run in debug mode
 
 # Debugging and Tracing