diff --git a/nmcli-with-gsm.md b/nmcli-with-gsm.md
index 6d445b8..8941e91 100644
--- a/nmcli-with-gsm.md
+++ b/nmcli-with-gsm.md
@@ -22,10 +22,12 @@ replace **yourapn** and **gsmusername** with your carrier service
 
 then we can see a `4GNet` in NetworkManager (like KDE's network manager UI)
 
-I got the cdc-wdm0 from 
+I got the cdc-wdm0 from with **qmi_wwan** driver
 ```
 mmcli -m 0 | grep "primary port"
 ```
+it will be **ttyUSB2** if use **qcdm** driver 
+
 
 Now we can use **nmtui** to connect 4GNet  
 or