Further this highlights another issue that isn't AT&Ts fault. That is for a given spectrum and technology you only have so much bandwidth for a given area. It is one of the reasons the telcos have ganged up on the FCC to steal spectrum from other services.
And how do one come about optimizing the use of available spectrum????
If you need more spectrum you can alway use more carriers or you could build more cell sites with smaller a footprint thous boosting local capacity and use the allocated spectrum more effective throughout the network. That is what GSM operaters have been doing for years every time they needed to expand capacity. Its not rocket science!
In stead of building more cell-sites AT&T are blaming the FCC. Spectrum is not "unlimited" and the world also need frequencies for radio, TV and other services.