A:Answer Make sure you have "LTE All" selected in the cellular settings. Otherwise, it will tend to connect to HSPA+ and give slower speeds. The bars displayed on the device doesn't mean as much as some of the data displayed on the diagnostics page. Check the RSRQ and RSRP values for optimal signal (chart attached). Try several different areas of your house looking at these values instead of the bars on the modem. If you are still having issues, I would recommend a Wilson Electronics Wideband Directional Antenna 700-2700 MHz (50 ohm). It would require some low loss coax cable with a splitter to 2x TS9. This has proved to be pretty reliable on a setup I have done (160mbps down). The antenna, cable, and splitter can all be purchased for around $100 if the other options do not help.