How Good is Rural Cellular Coverage – Part I

The FCC has opened a docket that periodically looks at ways to improve the FCC’s broadband and cellular maps. As part of that docket, Chairman Brendan Carr issued the following statement: On the mobile side, 96.8 percent of locations have access to mobile 5G services of at least 7/1 Mbps.

To put that into perspective, there are roughly 116.7 million total passings counted in the FCC maps, and the Chairman is saying that all except 3.7 million have good access to 5G. The Chairman’s statement can be supported by the FCC cellular maps, but I think the reality in rural areas is far different than what is shown on the maps. I’m not saying that the FCC maps are a lie – because I think it’s likely that the maps represent what the FCC asked carriers to report. But I think the maps tell a different story than what Chairman Carr is pushing, and I don’t think anywhere near 96.8% of folks in the country would say they have good cellular coverage.

Let’s look at the FCC maps for 5G coverage in an actual county in Illinois. I didn’t pick this county because it doesn’t have good cell coverage. The coverage in the counties around it would all tell the same story. One thing to note about this county is that there are homes located in all parts of the county – the areas with no coverage on these maps are not parklands or forests.

The following map shows AT&T 5G coverage from the FCC cellular maps. The FCC asks carriers to show coverage in two ways. The darker orange areas are where AT&T claims that 5G coverage will work in a moving vehicle. The lighter areas are where AT&T says that a customer can receive 5G when standing stationary outdoors. AT&T is claiming no 5G coverage in the gray areas.

This AT&T map is typical of rural cell coverage. Cell towers are located roughly in the center of the dark-colored areas, and those areas mostly covering towns and cities. Anybody who understands cellular technology understands that speeds drop quickly with distance from a cell site. The cellular download data speeds at the center of the dark areas could easily be as fast as 300 Mbps. But within two miles of a tower, speeds drop to around 25 Mbps. 5G speeds and coverage in the light-colored areas are a lot slower and spottier, and as you get to the outer parts of the light-colored areas, farthest from the towers, it’s likely that somebody would have to move around in their yard to find the sweet spot where they could make a call.

What this map doesn’t measure, and the FCC doesn’t ask about, is indoor cellular coverage. It’s a general rule of thumb that indoor speeds are roughly half of outdoor speeds. You can easily test this by taking an outdoor cellular speed test and then an indoor test away from a window (turn off your WiFi). If the carriers were to map expected indoor cellular coverage, the areas with indoor coverage would be a lot smaller than the light-colored areas shown for outdoor coverage.

When you ask a rural resident what good cell coverage means, they will define it as working in their home and working in their car. With that definition, AT&T doesn’t have great 5G coverage in the county for people who live or drive outside the dark circles.

Tomorrow’s blog will compare AT&T’s coverage to T-Mobile and Verizon to show the overall picture of cell coverage in this county.

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