I had learned this trick three routers ago. You cannot click your way to the VPN tab. You must navigate by hand.
I plugged the Ethernet cable into my ruggedized laptop. No Wi-Fi. Wi-Fi can be intercepted. I typed the gateway: 192.168.8.1 . Configure VPN on HUAWEI E5172
I uploaded the survey data. 4.2 GB. Two hours. The progress bar never stuttered. I had learned this trick three routers ago