diff --git a/include/grgsm/misc_utils/extract_system_info.h b/include/grgsm/misc_utils/extract_system_info.h
index c026096..2a4f625 100644
--- a/include/grgsm/misc_utils/extract_system_info.h
+++ b/include/grgsm/misc_utils/extract_system_info.h
@@ -49,12 +49,12 @@
        * creating new instances.
        */
       static sptr make();
-      virtual void show() = 0;
       virtual std::vector<int> get_chans() = 0;
       virtual std::vector<int> get_pwrs() = 0;
       virtual std::vector<int> get_lac() = 0;
       virtual std::vector<int> get_cell_id() = 0;
       virtual std::vector<int> get_mnc() = 0;
+      virtual std::vector<int> get_neighbours(int chan_id) = 0;
       virtual void reset() = 0;
     };