diff --git a/4G/4g.h b/4G/4g.h
index 8cc22c9..10bce04 100644
--- a/4G/4g.h
+++ b/4G/4g.h
@@ -1,4 +1,6 @@
 #include <string.h>
 
 void sch_4g_init(void);
-void sch_4g_set_parameter(char * param);
\ No newline at end of file
+void sch_4g_set_parameter(char * param);
+void sch_4g_get_parameter(char *param);
+void sch_4g_check_error(void);
\ No newline at end of file