4G modem/dongle recommendation

[watcher60]

All,
does anyone have any recommendations on a 4G USB modem/dongle to use with a 7800DXL. I currently have a huawei E3372-h which worked straight out of the box however is only giving approx 9.5Mbps throughput. When connected to the previous router it was giving approx 30Mbps. I am unsure if its due to the odd H-link mode the firmware put the dongle in.

thanks in advance

[Gianluca89]

I use a 4G dongle ZTE MF832 (branded O2 but unlocked) with my 7800DX as failover wan, it work just fine
~30Mbps download and ~40Mbps upload