diff --git a/How-to-make-phone-call---send-sms-with-4G-extension.md b/How-to-make-phone-call---send-sms-with-4G-extension.md
index 7fc357c..5c98ded 100644
--- a/How-to-make-phone-call---send-sms-with-4G-extension.md
+++ b/How-to-make-phone-call---send-sms-with-4G-extension.md
@@ -75,3 +75,4 @@ echo -e "Hello this is SMS message from shell\x1A" | sudo socat - /dev/ttyUSB3,c
 sleep 1
 echo -en "ATE0\r\n" | sudo socat - /dev/ttyUSB3,crnl
 ```
+replace **123456** with your really target phone number
\ No newline at end of file