I think now I understand what has been said above. It was my understanding that the wireless modem ("N") broadcasts to my phone using WiFi but when there is no incoming cable modem (I dont have an ISP) it is supposed to use the signal from the antenna with sufficent throughput to supply data to the phone (frequency, amplitude and bandwidth).
For this to work of course the antenna needs to be aligned with the incoming signal (trial and error
and the frequency needs to be recognized by the wifi router. I was under the impression that an "N" band router meets this need ?