Nighthawk LTE hotspot + external antennas

I'm sorry to note that most people here are almost completely lost with LTE antenna speculations. Netgear cannot know the environment you are using your MR1100. The external antennas are selected based on the radio conditions. Internal 4x4 Mimo antennas are good but if the distance to tower is longer then it may be good to use external mimo antennas. When you connect 2x2 Mimo antennas to MR1100 then internal 4x4 Mimo antennas are disabled. I have reached 600 Mbps download with both internal 4x4 Mimo and external 2x2 Mimo so both antenna solutions can give equally good performance. If you are using MR1100 in urban/city area then it is absolutely worth to try two external omni directional mimo antennas in 90 degrees angle because omni mimo can utilize signal reflections better than internal 4x4 mimo antennas.