Roberts County, SD Cell Phone Coverage Map & Network Rankings (2026)

Find the best cell phone network and plan to use in Roberts County, SD

Coverage rankings for Roberts County, SD

AT&T currently ranks first for coverage in this area, with a coverage score of 89.2. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.

RankCarrierScoreOverall4G LTE5GFast 5GAverage Signal
1AT&T89.299.6%99.3%97.5%78.9% -110 dBm
2T-Mobile77.186.7%86.5%72.7%43.4% -95 dBm
3Verizon66.699.9%99.9%24.9%13.4% -91 dBm

Scores include coverage area, network type, and average signal strength.

Cell phone coverage map for Roberts County, SD

Zoom in for local detail. Tap or click a colored area to see coverage and signal details. On mobile, use two fingers to move the map.

Coverage Key
Less covered More covered
Darker areas mean the carrier covers more of that location.

Map data © OpenStreetMap contributors, © CARTO. Rendered with MapLibre. FCC BDC mobile coverage processed by Compare Wireless Carriers.

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Cell phone coverage by network in Roberts County, SD

#1

AT&T

Coverage Score 89.2
In Roberts County, SD
Overall
99.6%
4G LTE
99.3%
5G
97.5%
Fast 5G
78.9%
Average Signal -110 dBm
#2

T-Mobile

Coverage Score 77.1
In Roberts County, SD
Overall
86.7%
4G LTE
86.5%
5G
72.7%
Fast 5G
43.4%
Average Signal -95 dBm
#3

Verizon

Coverage Score 66.6
In Roberts County, SD
Overall
99.9%
4G LTE
99.9%
5G
24.9%
Fast 5G
13.4%
Average Signal -91 dBm
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Coverage by city in Roberts County, SD

Cities and towns are shown for county-level comparison. Coverage percentages use land-area only coverage.

CityVerizonAT&TT-Mobile
Agency Village, SD 100.0% 100.0% 43.6% 34.3% -96 dBm 100.0% 100.0% 100.0% 98.3% -103 dBm 100.0% 100.0% 96.5% 82.0% -89 dBm
Claire City, SD 100.0% 100.0% 0.0% 0.0% -94 dBm 100.0% 100.0% 100.0% 100.0% -118 dBm 40.0% 40.0% 0.0% 0.0% -110 dBm
Corona, SD 100.0% 100.0% 0.0% 0.0% -90 dBm 100.0% 100.0% 100.0% 33.3% -115 dBm 100.0% 100.0% 83.3% 0.0% -100 dBm
Long Hollow, SD 96.5% 96.5% 5.5% 0.0% -98 dBm 98.3% 98.0% 91.3% 70.3% -109 dBm 67.9% 63.0% 49.6% 5.2% -101 dBm
New Effington, SD 100.0% 100.0% 0.0% 0.0% -93 dBm 100.0% 100.0% 100.0% 100.0% -109 dBm 85.7% 85.7% 85.7% 57.1% -92 dBm
Ortley, SD 100.0% 100.0% 0.0% 0.0% -91 dBm 100.0% 100.0% 100.0% 100.0% -104 dBm 98.1% 98.1% 76.9% 21.2% -97 dBm
Peever, SD 100.0% 100.0% 0.0% 0.0% -95 dBm 100.0% 100.0% 100.0% 100.0% -100 dBm 100.0% 100.0% 100.0% 0.0% -100 dBm
Peever Flats, SD 100.0% 100.0% 0.0% 0.0% -90 dBm 100.0% 100.0% 100.0% 100.0% -110 dBm 100.0% 100.0% 100.0% 0.0% -100 dBm
Rosholt, SD 100.0% 100.0% 0.0% 0.0% -89 dBm 100.0% 100.0% 100.0% 100.0% -104 dBm 100.0% 100.0% 100.0% 87.5% -94 dBm
Sisseton, SD 100.0% 100.0% 10.8% 0.0% -76 dBm 100.0% 100.0% 100.0% 73.0% -108 dBm 100.0% 100.0% 97.3% 70.3% -93 dBm
Summit, SD 100.0% 100.0% 0.0% 0.0% -88 dBm 100.0% 100.0% 100.0% 100.0% -101 dBm 100.0% 100.0% 100.0% 100.0% -87 dBm
White Rock, SD 100.0% 100.0% 37.8% 0.0% -96 dBm 100.0% 100.0% 100.0% 100.0% -115 dBm 97.3% 97.3% 78.4% 16.2% -100 dBm
White Rock Colony, SD 100.0% 100.0% 0.0% 0.0% -95 dBm 100.0% 100.0% 100.0% 100.0% -113 dBm 85.7% 85.7% 50.0% 14.3% -103 dBm
Wilmot, SD 100.0% 100.0% 0.0% 0.0% -75 dBm 100.0% 100.0% 100.0% 100.0% -113 dBm 75.0% 75.0% 41.7% 16.7% -102 dBm

About The Coverage Data

Coverage and signal estimates are derived by Compare Wireless Carriers from carrier-reported data in the FCC’s National Broadband Coverage Map, last updated in June 2025. “Percent covered” shows how much of the city or ZIP code area has a carrier signal, whether weak or strong. Signal bars show the estimated average signal strength in areas of Roberts County, SD where that carrier has coverage.

If a carrier says you should have service but you do not, run a challenge test with the FCC Mobile Speed Test App. The FCC uses those results to check carrier-submitted coverage data and requires a carrier response when enough tests show a pattern of inaccurate coverage reporting.