diff --git a/addons/caldav/doc/android.rst b/addons/caldav/doc/android.rst
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+==================================
+Synchronization with Android phone
+==================================
+
+Prerequire
+----------
+There is no buit-in way to synchronize calendar with caldav.
+So you need to install a third part software : Calendar (CalDav) 
+for now it's the only one
+
+configuration
+-------------
+
+1. Open Calendar Sync
+   I'll get an interface with 2 tabs
+   Stay on the first one
+   
+2. CaDAV Calendar URL : put the URL given above (ie : http://host.com:8069/webdav/db/calendars/users/demo/c/Meetings)
+
+3. Put your openerp username and password
+
+4. If your server don't use SSL, you'll get a warnign, say "Yes"
+
+5. Then you can synchronize manually or custom the settings to synchronize every x minutes.
+
+
+
diff --git a/addons/caldav/doc/sunbird.rst b/addons/caldav/doc/sunbird.rst
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+======================================
+Synchronization with Sunbird/Lightning
+======================================
+
+Prerequire
+----------
+If you are using thunderbird, first you need to install the lightning module
+http://www.mozilla.org/projects/calendar/lightning/
+
+configuration
+-------------
+
+1. Go to Calendar View
+
+2. File -> New Calendar
+
+3. Chosse "On the Network"
+
+4. for format choose CalDav
+   and as location the url given above (ie : http://host.com:8069/webdav/db/calendars/users/demo/c/Meetings)
+   
+5. Choose a name and a color for the Calendar, and we advice you to uncheck "alarm"
+
+6. Then put your openerp login and password (to give the password only check the box "Use password Manager to remember this password"
+
+7. Then Finish, your meetings should appear now in your calendar view
+
+