This seems to be a GUI limitation. I discovered that LTE is in use by using a command line tool called uqmi. Use as follows:
Enable dropbear/SSH.
Use Putty to SSH into the router.
Type the following:
uqmi -d /dev/cdc-wdm0 --get-signal-info
Should see something like what follows:
{
“type”: “hdr”,
“rssi”: -125,
“ecio”: 5,
“io”: -106,
“type”: “lte”,
“rssi”: -74,
“rsrq”: -8,
“rsrp”: -105,
“snr”: 142
}
I am fairly certain that LTE means what it says.