I while back I used to have the Ubee device and it was a piece of crap. It had all sorts of problems with having packet loss with the ubee router.
I was having intermittent problems with looking my VPN connect for work and all my problems went away when I started using the ubee device in bridge mode and using my own router.
I had a friend who got the same ubee device several months later and started having the same exactly problems. When he changed the ubee device into bridge mode and started using his own router all his problems disappeared too.