diff --git a/src/chatdlg.cpp b/src/chatdlg.cpp
index d49a716fb9..7a5433b6c2 100644
--- a/src/chatdlg.cpp
+++ b/src/chatdlg.cpp
@@ -93,6 +93,11 @@ CChatDlg::CChatDlg ( QWidget* parent ) : CBaseDlg ( parent, Qt::Window ) // use
     // Now tell the layout about the menu
     layout()->setMenuBar ( pMenu );
 
+#if defined( ANDROID ) || defined( Q_OS_IOS )
+    // for the Android and iOS version maximize the window (#3383)
+    setWindowState ( Qt::WindowMaximized );
+#endif
+
     // Connections -------------------------------------------------------------
     QObject::connect ( edtLocalInputText, &QLineEdit::textChanged, this, &CChatDlg::OnLocalInputTextTextChanged );
 
diff --git a/src/clientdlg.cpp b/src/clientdlg.cpp
index b102c34724..e64251da54 100644
--- a/src/clientdlg.cpp
+++ b/src/clientdlg.cpp
@@ -1033,8 +1033,12 @@ void CClientDlg::ShowChatWindow ( const bool bForceRaise )
 
     if ( bForceRaise )
     {
-        // make sure dialog is upfront and has focus
+#if defined( ANDROID ) || defined( Q_OS_IOS )
+        // on Android/iOS the dialog is always shown maximized (#3383); showNormal() would undo that
+#else
+        // make sure dialog is upfront and has focus (not applicable on Android/iOS, see above)
         ChatDlg.showNormal();
+#endif
         ChatDlg.raise();
         ChatDlg.activateWindow();
     }