Do I need to connect an antenna to the auxiliary SMA connector to connect to a LTE service?
We always recommend connecting both antennas to the SMA ports for better throughput. However, if that is not possible, a single antenna on the Cellular Main SMA connector is enough to connect to a LTE service.
What is the advantage of having two antennas connected independently to both the main and auxiliary SMA ports?
The two antennas on the main and auxiliary SMA ports will work together to increase data throughput. In addition, the auxiliary antenna also acts as a backup to the main antenna.