I gave up on RUT955, I tried new antennas even Teltonikas latest panorma antenna and it stuck at max 20Mbit download speed. ( I have antennas outside)
I order the new X11 and hope its better, else I just change platform to other brand for the company needs. ( not going to order a few hundred of RUT955 when the performance is this bad for sure, even older 4G routers that is a few years old are performing a lot better even with less potent WWAN chip. Something must be very wrong with the design of RUT955)
I guess its something with connectors or interfering form other component that make the RUT955 to be ultra slow)
Sorry to sound negative, but I got very unhappy.