Hi, it looks like you’re using a Huawei E398? Our instructions are for the E303. I guess the PID and VID were changed on that model.
I’m not sure what they are for that model. On the E303, there was a feature where on Windows you could plug in the modem and go to http://192.168.8.1/html/switchProjectMode.html and it would flip into serial mode. You could then find out the PID and VID in the Windows device manager. Maybe that’s a way to figure this out?