I live/work in the RF space both professionally and personally. So we both know some RF...j1mmyd wrote: And before this turns into an argument over qualifications, I'm not a trained RF Engineer.
The range vs bandwidth on 802.11n is such that non-household users would likely have to be fairly close to your AP to utilize it at a rate exceeding what is available over the air on a LTE network. Add a few walls, siding, brick, concrete floor, and the inversion point is likely to be less than 200 feet from AP to client device. Unless you are in a bad cell coverage area.
Usage might be a problem if you had a 2nd floor city apartment over a popular cafe that didn't offer wifi service, but in that case you're already in a fairly dense RF environment, with lots of devices, and channel contention already. So a few additional devices are not likely to make an appreciable difference in your net experience, and there are also likely other Comcast customers near by who would share the load.
If you are a suburban dweller, the end-user would need to be parked in your driveway, or in the street in front of the house. If they moved 100' in any direction, the would likely land on another Comcast customers AP.
There really is a simple solution to all of this... replace Comcast's provided cable modem/AP with your own.
