Also take a look at spectrum efficiency, which is the "practical implementation" of all this. It really helps to understand how spectrum is a limited public re

Also take a look at spectrum efficiency, which is the "practical implementation" of all this. It really helps to understand how spectrum is a limited public resource. For example, a carrier with 20MHz of spectrum each way and a tower covering 1km2 in 3 sectors could offer at most 60Mbps down over 3G. If you have 6000 customers in that same area (remember that some cities have densities in the 10+k/km2), that means ~10Kbps per customer on average, which is enough for 1.5 GB/month/customer.