the dongle should be able to handle 75Mbps (searched for some speed tests), which leads me to believe the problem could be a) position of the 4G antenna - it is

the dongle should be able to handle 75Mbps (searched for some speed tests), which leads me to believe the problem could be a) position of the 4G antenna - it is internal so not as powerful as their previous router which had external - have they tried placing the dongle on the top floor of his house near a window facing the nearest 4G mast? not a lot is explained about the testing process b) the mini router consumes 0.5W power! could the USB 2.0 port even provide the standard 2.5W, or anywhere near it for that matter? c) a combination of both