Do you guys have any understanding of how wireless technology works?
Wireless communication does not work on a single frequency. It works on a range (referred to as the bandwidth for obvious reasons) and this range is usually denoted by a single frequency number that is the center of this range.
The range of frequency (bandwidth of spectrum) that a particular provider has been allocated it intrinsically linked with the amount of speed that they can provide on their WiMax towers. Each tower in close proximity needs to be using a different piece of spectrum so that they do not interfere with each other. The total allocated spectrum has to be cut up into tiny slices for each WiMax base station and this defines the theoretical maximum speed that can be achieved.