Hello. I sold my flat and bought a house without optic fiber so I tried to add a 3G Huawei E3131H-2 to my N66U router with Merlin`s firmware 378.55 to have internet in my house but is not recognised. Beeing addicted to internet I had to install tomato firmware and is working but I miss Merlin`s features. How come the usb stick is not working with merlin? I`m doing something wrong? Thank you.