If you have a 3G/4G/LTE device connected to one of your access points, the HOME | Dashboard > WWAN page offers monitoring information on that device.

The first panel provides connectivity data and modem status, and the second panel shows a graphical representation of the device’s signal strength.

If no 3G/4G/LTE device is detected on one of your access points, you get the following message on the HOME | Dashboard > WWAN | Signal Strength page:

No Device / Not Detected.