Carrierlytics County Coverage Guide

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.

Using FCC mobile coverage data across cities and ZIP codes in Southeastern Connecticut County, CT, Carrierlytics compares the top-performing networks and the cheapest plans that use them.

Southeastern Connecticut County, CT

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 Carrierlytics.

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Cell phone coverage rankings 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% avg. -93 dBm 4G LTE signal where 4G LTE coverage exists: avg. -93 dBm
5G
85.0% avg. -90 dBm 5G signal where 5G coverage exists: avg. -90 dBm
Fast 5G
61.5% avg. -86 dBm Fast 5G signal where Fast 5G coverage exists: avg. -86 dBm
#2

Verizon

Coverage Score 65.9
In Southeastern Connecticut County, CT
Overall
97.1%
4G LTE
97.0% avg. -93 dBm 4G LTE signal where 4G LTE coverage exists: avg. -93 dBm
5G
33.7% avg. -95 dBm 5G signal where 5G coverage exists: avg. -95 dBm
Fast 5G
18.1% avg. -90 dBm Fast 5G signal where Fast 5G coverage exists: avg. -90 dBm
#3

AT&T

Coverage Score 65.5
In Southeastern Connecticut County, CT
Overall
97.9%
4G LTE
97.9% avg. -107 dBm 4G LTE signal where 4G LTE coverage exists: avg. -107 dBm
5G
59.1% avg. -113 dBm 5G signal where 5G coverage exists: avg. -113 dBm
Fast 5G
42.6% avg. -111 dBm Fast 5G signal where Fast 5G coverage exists: avg. -111 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.

City Verizon AT&T T-Mobile
Baltic, CT 96.8% 96.8% 71.0% 38.7% 100.0% 100.0% 22.6% 16.1% 100.0% 100.0% 100.0% 93.5%
Bozrah, CT 96.6% 96.6% 25.9% 13.2% 95.3% 95.3% 55.6% 36.3% 90.7% 90.7% 79.4% 55.8%
Colchester, CT 100.0% 100.0% 15.2% 3.6% 100.0% 100.0% 67.0% 50.0% 99.1% 99.1% 95.5% 67.9%
Conning Towers-Nautilus Park, CT 100.0% 100.0% 58.5% 42.3% 99.2% 99.2% 74.8% 53.7% 100.0% 100.0% 96.7% 90.2%
East Lyme, CT 95.4% 95.4% 13.5% 6.4% 97.5% 97.5% 38.1% 21.4% 78.3% 78.3% 55.7% 33.5%
Gales Ferry, CT 100.0% 100.0% 47.8% 26.1% 100.0% 100.0% 69.6% 30.4% 100.0% 100.0% 100.0% 91.3%
Gilman, CT 100.0% 100.0% 7.1% 0.0% 100.0% 100.0% 78.6% 78.6% 100.0% 100.0% 100.0% 100.0%
Groton, CT 98.7% 98.7% 70.1% 48.1% 96.1% 96.1% 94.8% 74.0% 98.7% 98.7% 98.7% 97.4%
Groton Long Point, CT 100.0% 100.0% 30.0% 0.0% 100.0% 100.0% 60.0% 20.0% 100.0% 100.0% 40.0% 10.0%
Hanover, CT 100.0% 100.0% 12.5% 0.0% 100.0% 100.0% 0.0% 0.0% 100.0% 100.0% 75.0% 25.0%
Jewett City, CT 100.0% 100.0% 5.6% 0.0% 100.0% 100.0% 44.4% 27.8% 100.0% 100.0% 94.4% 66.7%
Lebanon, CT 96.0% 95.9% 31.6% 14.7% 93.9% 93.9% 43.0% 33.9% 83.5% 83.4% 67.0% 41.2%
Ledyard, CT 96.8% 96.6% 28.6% 13.2% 99.7% 99.7% 80.2% 54.2% 79.1% 79.1% 63.5% 40.0%
Long Hill, CT 100.0% 100.0% 91.9% 56.8% 100.0% 100.0% 100.0% 97.3% 100.0% 100.0% 100.0% 100.0%
Mashantucket, CT 96.9% 96.9% 46.9% 31.3% 100.0% 100.0% 81.3% 59.4% 87.5% 87.5% 84.4% 46.9%
Montville, CT 100.0% 100.0% 100.0% 75.0% 100.0% 100.0% 100.0% 100.0% 75.0% 75.0% 62.5% 37.5%
Mystic, CT 100.0% 100.0% 52.3% 33.0% 97.7% 97.7% 85.2% 68.2% 98.9% 98.9% 94.3% 79.5%
New London, CT 100.0% 100.0% 78.7% 61.8% 100.0% 100.0% 100.0% 68.4% 99.3% 99.3% 99.3% 94.1%
Niantic, CT 100.0% 100.0% 73.0% 48.6% 100.0% 100.0% 94.6% 59.5% 100.0% 100.0% 100.0% 91.9%
Noank, CT 100.0% 100.0% 74.3% 54.3% 100.0% 100.0% 97.1% 85.7% 100.0% 100.0% 100.0% 80.0%
North Franklin, CT 98.3% 98.3% 49.4% 26.2% 99.2% 99.2% 81.2% 62.8% 95.4% 95.4% 86.2% 64.2%
North Stonington, CT 94.8% 94.7% 25.8% 12.0% 98.3% 98.3% 52.9% 32.8% 97.6% 97.6% 89.2% 62.8%
North Windham, CT 96.1% 96.1% 32.8% 17.2% 95.0% 95.0% 55.6% 42.2% 90.0% 90.0% 70.6% 26.1%
Norwich, CT 99.9% 99.9% 47.4% 25.2% 99.9% 99.9% 78.5% 56.7% 100.0% 100.0% 98.8% 86.5%
Oakdale, CT 97.8% 97.8% 26.8% 10.6% 98.1% 98.1% 57.3% 43.2% 92.1% 92.1% 76.2% 49.9%
Old Mystic, CT 100.0% 100.0% 55.2% 30.5% 99.0% 99.0% 84.8% 66.7% 100.0% 100.0% 100.0% 90.5%
Oxoboxo River, CT 100.0% 100.0% 64.8% 38.0% 100.0% 100.0% 80.6% 54.6% 95.4% 95.4% 86.1% 60.2%
Pawcatuck, CT 100.0% 100.0% 61.0% 36.6% 100.0% 100.0% 98.8% 87.8% 100.0% 100.0% 100.0% 97.6%
Poquonock Bridge, CT 100.0% 100.0% 69.7% 57.6% 100.0% 100.0% 93.9% 75.8% 97.0% 97.0% 87.9% 75.8%
Preston, CT 89.0% 88.7% 14.9% 6.5% 96.5% 96.5% 33.5% 23.8% 94.1% 94.1% 84.1% 58.6%
Quaker Hill, CT 99.0% 99.0% 49.0% 28.1% 99.0% 99.0% 49.0% 27.6% 99.0% 99.0% 96.4% 84.9%
Salem, CT 98.6% 98.6% 32.2% 16.0% 98.9% 98.9% 62.9% 50.8% 97.3% 97.3% 90.7% 69.3%
South Windham, CT 100.0% 100.0% 51.9% 19.5% 100.0% 100.0% 64.9% 54.5% 98.7% 98.7% 97.4% 79.2%
Stonington, CT 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
Taftville, CT 100.0% 100.0% 9.1% 0.0% 100.0% 100.0% 100.0% 86.4% 100.0% 100.0% 100.0% 90.9%
Uncasville, CT 100.0% 100.0% 49.3% 27.1% 100.0% 100.0% 80.9% 61.8% 97.2% 97.2% 91.3% 72.4%
Waterford, CT 100.0% 100.0% 64.4% 40.0% 100.0% 100.0% 100.0% 68.9% 100.0% 100.0% 100.0% 100.0%
Willimantic, CT 100.0% 100.0% 66.4% 35.9% 100.0% 100.0% 54.2% 38.9% 100.0% 100.0% 100.0% 93.1%
Windham, CT 95.4% 95.4% 39.3% 24.9% 94.3% 94.3% 52.2% 47.3% 93.4% 93.4% 77.0% 53.6%
Yantic, CT 100.0% 100.0% 0.0% 0.0% 100.0% 100.0% 100.0% 50.0% 100.0% 100.0% 100.0% 100.0%
East Hampton, CT 100.0% 100.0% 34.3% 13.1% 100.0% 100.0% 76.8% 59.6% 100.0% 100.0% 98.0% 80.8%

About The Coverage Data

Coverage and signal estimates are derived by Carrierlytics 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.