diff --git a/sms/main.py b/sms/main.py
index 5ad8d6d..a34431f 100644
--- a/sms/main.py
+++ b/sms/main.py
@@ -12,6 +12,8 @@ import ugfx
 import ugfx_helper
 import sim800
 
+sim800.poweron()
+
 ugfx_helper.init()
 ugfx.clear()