diff --git a/How-to-upgrade-flash-4G-ext-firmware.md b/How-to-upgrade-flash-4G-ext-firmware.md
index d4579d4..3ce560c 100644
--- a/How-to-upgrade-flash-4G-ext-firmware.md
+++ b/How-to-upgrade-flash-4G-ext-firmware.md
@@ -154,6 +154,12 @@ Finally, run "sudo dmesg | tail" to check for the following output:
 [ 1033.966622] usbcore: registered new interface driver rndis_wlan
 
 ```
+now you can see 9011 in lsusb
+```
+cpi@raspberrypi:~/LE20B04SIM7600G22_cpi $ sudo lsusb
+Bus 001 Device 008: ID 1e0e:9011 Qualcomm / Option SimTech, Incorporated
+```
+and `sudo ifconfig usb0`
 
 So, the appearance of usb0 indicates success.