Longtome Airave user and never had issues until the Airave 4...The first A4 came in and they couldn't register it. They sent me another A4 and I can get every light solid green except LTE. So they are now going to send me a 3rd one but I suspect it's more to do with my network. I need to plug the A4 into my cable modem instead of my Eero because the 2 ports are taken. My Tivo goes into the Eero and the Eero goes into the cable modem for the Moca network to work. Also, since Sprint is sending me a 3rd A4 would this mean the second one which is not working is unregistered and that I'll need to troubleshoot when the 3rd comes in? Can anyone assist? Thank you.