Dongle 4G for raspberry Pi and navio+

I have a dongle 3G/4G model Huawei e8278s-602. I connect it to raspberry Pi model 2 B.
I use this guide How to setup a USB 3G Modem on Raspberry PI using usb_modeswitch and wvdial | How To | The Fan Club | dynamic design solutions but I don´t have internet. I use the program sakis3g too but it does not work.
Has anyone managed to get 4G with this dongle?
Does anyone know of any 3G / 4G dongle that works in the raspberry pi 2 B?
Thanks you.