Adams County, IN Cell Phone Coverage Map & Network Rankings (2026)

Find the best cell phone network and plan to use in Adams County, IN

Coverage rankings for Adams County, IN

T-Mobile currently ranks first for coverage in this area, with a coverage score of 82.2. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.

RankCarrierScoreOverall4G LTE5GFast 5GAverage Signal
1T-Mobile82.291.1%91.1%78.3%50.3% -94 dBm
2AT&T80.999.6%99.6%77.4%54.2% -116 dBm
3Verizon72.198.8%98.8%47.9%22.9% -97 dBm

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

Cell phone coverage map for Adams County, IN

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 Adams County, IN

#1

T-Mobile

Coverage Score 82.2
In Adams County, IN
Overall
91.1%
4G LTE
91.1%
5G
78.3%
Fast 5G
50.3%
Average Signal -94 dBm
#2

AT&T

Coverage Score 80.9
In Adams County, IN
Overall
99.6%
4G LTE
99.6%
5G
77.4%
Fast 5G
54.2%
Average Signal -116 dBm
#3

Verizon

Coverage Score 72.1
In Adams County, IN
Overall
98.8%
4G LTE
98.8%
5G
47.9%
Fast 5G
22.9%
Average Signal -97 dBm
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Coverage by city in Adams County, IN

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

CityVerizonAT&TT-Mobile
Berne, IN 100.0% 100.0% 98.2% 89.3% -82 dBm 100.0% 100.0% 100.0% 94.6% -93 dBm 100.0% 100.0% 100.0% 100.0% -72 dBm
Decatur, IN 100.0% 100.0% 95.3% 81.3% -87 dBm 100.0% 100.0% 100.0% 91.3% -100 dBm 100.0% 100.0% 100.0% 99.3% -79 dBm
Geneva Census Place 1827216, IN 100.0% 100.0% 0.0% 0.0% -101 dBm 100.0% 100.0% 100.0% 92.9% -96 dBm 50.0% 50.0% 28.6% 0.0% -104 dBm
Linn Grove, IN 100.0% 100.0% 50.0% 0.0% -100 dBm 100.0% 100.0% 100.0% 0.0% -120 dBm 100.0% 100.0% 100.0% 33.3% -97 dBm
Monroe, IN 100.0% 100.0% 66.7% 0.0% -97 dBm 100.0% 100.0% 66.7% 66.7% -120 dBm 93.3% 93.3% 73.3% 20.0% -99 dBm
Pleasant Mills, IN 100.0% 100.0% 40.0% 20.0% -101 dBm 100.0% 100.0% 30.0% 30.0% -117 dBm 100.0% 100.0% 80.0% 30.0% -98 dBm
Preble, IN 100.0% 100.0% 80.0% 0.0% -100 dBm 100.0% 100.0% 100.0% 20.0% -116 dBm 100.0% 100.0% 100.0% 60.0% -94 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 Adams County, IN 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.