diff --git a/mbtk/include/lynq/lynq-qser-data.h b/mbtk/include/lynq/lynq-qser-data.h
index 0d85f67..1140e86 100755
--- a/mbtk/include/lynq/lynq-qser-data.h
+++ b/mbtk/include/lynq/lynq-qser-data.h
@@ -180,6 +180,18 @@
 extern int qser_data_call_start(qser_data_call_s *data_call, qser_data_call_error_e *err);
 
 /**
+ * Starts a data call. If profile index is zero, it will call CDMA profile.
+ *
+ * @param [in] data_call        The data call parameters
+ * @param [out] error           Error code returned by data call 
+ *
+ * @return 
+ *   On success, 0 is returned.  On error, -1 is returned.
+ * 
+ */
+extern int qser_data_call_start_async(qser_data_call_s *data_call, qser_data_call_error_e *err);
+
+/**
  * Stop a data call.
  *
  * @param [in] profile_idx      UMTS/CDMA profile ID