Southeastern Connecticut County, CT Cell Phone Coverage Map & Network Rankings (2026)

Find the best cell phone network and plan to use in Southeastern Connecticut County, CT

Coverage rankings for Southeastern Connecticut County, CT

T-Mobile currently ranks first for coverage in this area, with a coverage score of 85.8. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.

RankCarrierScoreOverall4G LTE5GFast 5GAverage Signal
1T-Mobile85.894.2%94.2%85.0%61.5% -92 dBm
2Verizon65.997.1%97.0%33.7%18.1% -97 dBm
3AT&T65.597.9%97.9%59.1%42.6% -114 dBm

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

Cell phone coverage map for Southeastern Connecticut County, CT

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 Southeastern Connecticut County, CT

#1

T-Mobile

Coverage Score 85.8
In Southeastern Connecticut County, CT
Overall
94.2%
4G LTE
94.2%
5G
85.0%
Fast 5G
61.5%
Average Signal -92 dBm
#2

Verizon

Coverage Score 65.9
In Southeastern Connecticut County, CT
Overall
97.1%
4G LTE
97.0%
5G
33.7%
Fast 5G
18.1%
Average Signal -97 dBm
#3

AT&T

Coverage Score 65.5
In Southeastern Connecticut County, CT
Overall
97.9%
4G LTE
97.9%
5G
59.1%
Fast 5G
42.6%
Average Signal -114 dBm
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Coverage by city in Southeastern Connecticut County, CT

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

CityVerizonAT&TT-Mobile
Baltic, CT 96.8% 96.8% 71.0% 38.7% -95 dBm 100.0% 100.0% 22.6% 16.1% -108 dBm 100.0% 100.0% 100.0% 93.5% -88 dBm
Bozrah, CT N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Colchester, CT 100.0% 100.0% 15.2% 3.6% -90 dBm 100.0% 100.0% 67.0% 50.0% -108 dBm 99.1% 99.1% 95.5% 67.9% -91 dBm
Conning Towers-Nautilus Park, CT 100.0% 100.0% 58.5% 42.3% -92 dBm 99.2% 99.2% 74.8% 53.7% -111 dBm 100.0% 100.0% 96.7% 90.2% -84 dBm
East Lyme, CT N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Gales Ferry, CT 100.0% 100.0% 47.8% 26.1% -93 dBm 100.0% 100.0% 69.6% 30.4% -116 dBm 100.0% 100.0% 100.0% 91.3% -87 dBm
Gilman, CT N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Groton, CT 98.7% 98.7% 70.1% 48.1% -90 dBm 96.1% 96.1% 94.8% 74.0% -107 dBm 98.7% 98.7% 98.7% 97.4% -83 dBm
Groton Long Point, CT 100.0% 100.0% 30.0% 0.0% -103 dBm 100.0% 100.0% 60.0% 20.0% -119 dBm 100.0% 100.0% 40.0% 10.0% -100 dBm
Hanover, CT N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Jewett City, CT 100.0% 100.0% 5.6% 0.0% -97 dBm 100.0% 100.0% 44.4% 27.8% -116 dBm 100.0% 100.0% 94.4% 66.7% -92 dBm
Lebanon, CT N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Ledyard, CT N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Long Hill, CT 100.0% 100.0% 91.9% 56.8% -86 dBm 100.0% 100.0% 100.0% 97.3% -102 dBm 100.0% 100.0% 100.0% 100.0% -81 dBm
Mashantucket, CT 96.9% 96.9% 46.9% 31.3% -91 dBm 100.0% 100.0% 81.3% 59.4% -110 dBm 87.5% 87.5% 84.4% 46.9% -91 dBm
Montville, CT N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Mystic, CT 100.0% 100.0% 52.3% 33.0% -91 dBm 97.7% 97.7% 85.2% 68.2% -110 dBm 98.9% 98.9% 94.3% 79.5% -83 dBm
New London, CT 100.0% 100.0% 78.7% 61.8% -89 dBm 100.0% 100.0% 100.0% 68.4% -106 dBm 99.3% 99.3% 99.3% 94.1% -80 dBm
Niantic, CT 100.0% 100.0% 73.0% 48.6% -87 dBm 100.0% 100.0% 94.6% 59.5% -113 dBm 100.0% 100.0% 100.0% 91.9% -90 dBm
Noank, CT 100.0% 100.0% 74.3% 54.3% -92 dBm 100.0% 100.0% 97.1% 85.7% -111 dBm 100.0% 100.0% 100.0% 80.0% -92 dBm
North Franklin, CT N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
North Stonington, CT N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
North Windham, CT N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Norwich, CT 99.9% 99.9% 47.4% 25.2% -94 dBm 99.9% 99.9% 78.5% 56.7% -112 dBm 100.0% 100.0% 98.8% 86.5% -87 dBm
Oakdale, CT N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Old Mystic, CT 100.0% 100.0% 55.2% 30.5% -91 dBm 99.0% 99.0% 84.8% 66.7% -111 dBm 100.0% 100.0% 100.0% 90.5% -86 dBm
Oxoboxo River, CT 100.0% 100.0% 64.8% 38.0% -93 dBm 100.0% 100.0% 80.6% 54.6% -114 dBm 95.4% 95.4% 86.1% 60.2% -92 dBm
Pawcatuck, CT 100.0% 100.0% 61.0% 36.6% -92 dBm 100.0% 100.0% 98.8% 87.8% -112 dBm 100.0% 100.0% 100.0% 97.6% -82 dBm
Poquonock Bridge, CT 100.0% 100.0% 69.7% 57.6% -92 dBm 100.0% 100.0% 93.9% 75.8% -112 dBm 97.0% 97.0% 87.9% 75.8% -91 dBm
Preston, CT N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Quaker Hill, CT N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Salem, CT N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
South Windham, CT 100.0% 100.0% 51.9% 19.5% -97 dBm 100.0% 100.0% 64.9% 54.5% -115 dBm 98.7% 98.7% 97.4% 79.2% -93 dBm
Stonington, CT 100.0% 100.0% 100.0% 100.0% -78 dBm 100.0% 100.0% 100.0% 100.0% -89 dBm 100.0% 100.0% 100.0% 100.0% -68 dBm
Taftville, CT N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Uncasville, CT N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Waterford, CT 100.0% 100.0% 64.4% 40.0% -91 dBm 100.0% 100.0% 100.0% 68.9% -105 dBm 100.0% 100.0% 100.0% 100.0% -86 dBm
Willimantic, CT 100.0% 100.0% 66.4% 35.9% -94 dBm 100.0% 100.0% 54.2% 38.9% -110 dBm 100.0% 100.0% 100.0% 93.1% -86 dBm
Windham, CT N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Yantic, CT N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
East Hampton, CT 100.0% 100.0% 34.3% 13.1% -98 dBm 100.0% 100.0% 76.8% 59.6% -115 dBm 100.0% 100.0% 98.0% 80.8% -88 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 Southeastern Connecticut County, CT 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.