Comment: Re:Efficiency (Score 4, Interesting) 103
At some point it will depend on your definition of efficiency.
At the moment none of the four major carriers in the US are using common protocols and frequencies for G3 service and above. They may be using some frequencies in common, or some protocols in common, but to differentiate their services, they don't use common protocols. A side effect of this is that you can take a walk with three other people, each of you using a different provider's phone, and walk through almost any major metro area, and see different carriers signal levels fluctuating all over the place. It's nearly impossible to roam on other carriers services, and almost no-one is providing general coverage service outside of major metro areas. In some parts of the US, you are better off having an Iridium phone than anything from a cellular carrier.
Yes, each carrier is working hard to provide solid coverage in the metro areas, but it's not going to happen. The frequencies that provide the best reach into where the customer is are either already in use, or don't have sufficient capacity for high bandwidth. 700mhz may seem like a magic bullet, but remember that a TV channel has about enough bandwidth for 45 mbps, one way, and to spread that across 100 customers for a cell (or worse) means that no-one is going to see 500 kbps, or less than 60kB/s. To get higher throughput, you have to go to higher frequencies. And higher frequencies don't reach into buildings as well. Great coverage out on the street, perhaps, but that reflective surface on the window to keep the temperature down in the glass building does a serious number on signal reception.
And since 800mhz analog has been eliminated, there are a lot of towers across the US that it just didn't make economic sense to convert to digital service. That may start changing if the FCC mandates that the only way that they are going to open more spectrum is if there is broader distribution of coverage across the US. But I'm not going to hold my breath for that. I figure the likelyhood of that is right up there with the FCC mandating that US carriers all start using common protocols and allow users to use any new phone on the market with any carrier, at the phone's best transfer rate. I just don't see it happening.