WCOs will not pair with base station - Android

OK, Here is the scenario. Purchased WCO base + three additional cams.
-The base station set up was easy.
-Setting up the cam that was packaged with the base station was also pretty easy (CAM 1).

The three additional cams that were packaged separately (CAMS 2 - 4) aren’t wanting to pair with the base station.
-The cams are fully charged (blinked red until fully charged, now solid red light)
-When I turn on the Cams 2-4 a solid yellow light appears and goes off after about 15ish seconds
-The cams never seem to display a blinking yellow (pairing) light.
-Firmware on the base station shows it’s up to date.

Now do I get these other three cams paired up?