Question about Huawei Mobile WiFi E5785

That is not possible.

If you want to expand / strengthen your existing WLAN. You can use a repeater or Axcess Point. (Limited ranges)

But logging in with this device and then accessing your WLAN while on the move is not possible, as the Huawei Mobile WiFi E5785 device can no longer establish a connection at some point or it is a normal router which simply has a SIM card slot to establish a "WLAN" while on the move via a SIM card subscription.

With this device, you are logged into a public network like with your mobile phone, on which you then pay additional subscription fees or via your mobile phone subscription (second sim card required).

I do not know the answer