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

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

Coverage rankings for Deuel County, SD

T-Mobile currently ranks first for coverage in this area, with a coverage score of 89.1. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.

RankCarrierScoreOverall4G LTE5GFast 5GAverage Signal
1T-Mobile89.193.5%93.5%87.7%69.4% -90 dBm
2AT&T87.999.0%96.2%91.2%79.7% -112 dBm
3Verizon63.3100.0%100.0%12.6%9.0% -90 dBm

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

Cell phone coverage map for Deuel 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 Deuel County, SD

#1

T-Mobile

Coverage Score 89.1
In Deuel County, SD
Overall
93.5%
4G LTE
93.5%
5G
87.7%
Fast 5G
69.4%
Average Signal -90 dBm
#2

AT&T

Coverage Score 87.9
In Deuel County, SD
Overall
99.0%
4G LTE
96.2%
5G
91.2%
Fast 5G
79.7%
Average Signal -112 dBm
#3

Verizon

Coverage Score 63.3
In Deuel County, SD
Overall
100.0%
4G LTE
100.0%
5G
12.6%
Fast 5G
9.0%
Average Signal -90 dBm
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Coverage by city in Deuel County, SD

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

CityVerizonAT&TT-Mobile
Altamont, SD 100.0% 100.0% 0.0% 0.0% -94 dBm 100.0% 100.0% 93.3% 93.3% -118 dBm 100.0% 100.0% 90.0% 33.3% -98 dBm
Astoria, SD 100.0% 100.0% 0.0% 0.0% -108 dBm 50.0% 50.0% 0.0% 0.0% -120 dBm N/A N/A N/A N/A N/A
Brandt, SD 100.0% 100.0% 32.3% 25.8% -95 dBm 100.0% 100.0% 100.0% 100.0% -110 dBm 100.0% 100.0% 87.1% 45.2% -97 dBm
Clear Lake, SD 100.0% 100.0% 0.0% 0.0% -77 dBm 100.0% 100.0% 100.0% 100.0% -99 dBm 100.0% 100.0% 100.0% 100.0% -79 dBm
Gary, SD 100.0% 100.0% 0.0% 0.0% -88 dBm 100.0% 100.0% 100.0% 78.6% -107 dBm 100.0% 100.0% 100.0% 100.0% -89 dBm
Goodwin, SD 100.0% 100.0% 0.0% 0.0% -100 dBm 100.0% 100.0% 100.0% 76.9% -107 dBm 92.3% 92.3% 92.3% 53.8% -93 dBm
Toronto, SD 100.0% 100.0% 100.0% 100.0% -84 dBm 100.0% 100.0% 100.0% 85.7% -114 dBm 85.7% 85.7% 57.1% 0.0% -103 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 Deuel 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.