[feature]Screen

Change-Id: I309a8cdad870de51b76c9b6bc61df6768de4f301
diff --git a/src/lynq/lib/liblynq-sim/include/lynq_sim.h b/src/lynq/lib/liblynq-sim/include/lynq_sim.h
index e7f534f..8476205 100755
--- a/src/lynq/lib/liblynq-sim/include/lynq_sim.h
+++ b/src/lynq/lib/liblynq-sim/include/lynq_sim.h
@@ -28,6 +28,7 @@
 int lynq_unlock_pin(char *puk, char *pin);
 int lynq_query_phone_number(char buf[]);
 int lynq_switch_card(int slot);
+int lynq_screen(int num);
 /*add by lei*/