Lower Connecticut River Valley County, CT Cell Phone Coverage Map & Network Rankings (2026)

Find the best cell phone network and plan to use in Lower Connecticut River Valley County, CT

Coverage rankings for Lower Connecticut River Valley County, CT

T-Mobile currently ranks first for coverage in this area, with a coverage score of 82.4. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.

RankCarrierScoreOverall4G LTE5GFast 5GAverage Signal
1T-Mobile82.489.1%89.1%77.6%54.7% -93 dBm
2AT&T75.696.8%96.8%59.3%47.2% -114 dBm
3Verizon67.395.4%95.4%32.4%20.3% -95 dBm

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

Cell phone coverage map for Lower Connecticut River Valley 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 Lower Connecticut River Valley County, CT

#1

T-Mobile

Coverage Score 82.4
In Lower Connecticut River Valley County, CT
Overall
89.1%
4G LTE
89.1%
5G
77.6%
Fast 5G
54.7%
Average Signal -93 dBm
#2

AT&T

Coverage Score 75.6
In Lower Connecticut River Valley County, CT
Overall
96.8%
4G LTE
96.8%
5G
59.3%
Fast 5G
47.2%
Average Signal -114 dBm
#3

Verizon

Coverage Score 67.3
In Lower Connecticut River Valley County, CT
Overall
95.4%
4G LTE
95.4%
5G
32.4%
Fast 5G
20.3%
Average Signal -95 dBm
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Coverage by city in Lower Connecticut River Valley County, CT

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

CityVerizonAT&TT-Mobile
Centerbrook, CT 100.0% 100.0% 70.4% 37.0% -88 dBm 96.3% 96.3% 66.7% 66.7% -111 dBm 100.0% 100.0% 96.3% 96.3% -84 dBm
Chester, CT 92.4% 91.9% 22.1% 8.9% -99 dBm 91.3% 91.3% 46.1% 34.6% -117 dBm 72.8% 72.8% 57.5% 39.4% -95 dBm
Chester Center, CT 96.9% 93.8% 36.9% 13.8% -96 dBm 100.0% 100.0% 76.9% 63.1% -114 dBm 96.9% 96.9% 95.4% 86.2% -89 dBm
Clinton, CT 100.0% 100.0% 87.5% 66.1% -91 dBm 100.0% 100.0% 100.0% 98.2% -109 dBm 100.0% 100.0% 100.0% 100.0% -79 dBm
Cobalt, CT 100.0% 100.0% 20.6% 8.8% -94 dBm 97.1% 97.1% 73.5% 70.6% -116 dBm 100.0% 100.0% 100.0% 76.5% -86 dBm
Cromwell, CT 100.0% 100.0% 92.6% 85.3% -84 dBm 99.7% 99.7% 92.3% 71.2% -111 dBm 100.0% 100.0% 100.0% 96.3% -84 dBm
Deep River, CT 98.8% 98.8% 33.2% 16.8% -96 dBm 98.5% 98.5% 36.0% 31.1% -114 dBm 92.4% 92.4% 79.6% 55.8% -92 dBm
Deep River Center, CT 100.0% 100.0% 48.4% 28.6% -95 dBm 100.0% 100.0% 34.1% 27.5% -111 dBm 97.8% 97.8% 93.4% 78.0% -88 dBm
Durham, CT 99.0% 99.0% 50.3% 32.7% -93 dBm 100.0% 100.0% 81.4% 66.3% -113 dBm 96.5% 96.5% 92.0% 68.3% -92 dBm
East Haddam, CT 87.4% 87.4% 14.7% 5.8% -101 dBm 96.0% 96.0% 44.2% 31.3% -115 dBm 75.9% 75.9% 54.2% 30.0% -98 dBm
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
Essex, CT 100.0% 100.0% 46.7% 32.1% -92 dBm 95.6% 95.6% 49.6% 43.8% -113 dBm 97.1% 97.1% 93.4% 77.4% -89 dBm
Essex Village, CT 100.0% 100.0% 46.8% 33.0% -91 dBm 94.7% 94.7% 45.7% 40.4% -113 dBm 95.7% 95.7% 91.5% 73.4% -90 dBm
Fenwick, CT 100.0% 100.0% 50.0% 0.0% -95 dBm 100.0% 100.0% 100.0% 50.0% -115 dBm 100.0% 100.0% 100.0% 87.5% -86 dBm
Haddam, CT 86.6% 86.6% 22.6% 11.6% -100 dBm 94.0% 94.0% 47.0% 34.5% -117 dBm 66.7% 66.7% 34.2% 15.2% -101 dBm
Higganum, CT 98.7% 98.7% 16.8% 6.7% -91 dBm 97.3% 97.3% 69.1% 58.4% -112 dBm 92.6% 92.6% 86.6% 75.2% -89 dBm
Ivoryton, CT 100.0% 100.0% 40.4% 21.3% -96 dBm 94.4% 94.4% 22.5% 12.4% -112 dBm 75.3% 75.3% 50.6% 19.1% -101 dBm
Killingworth, CT 92.3% 92.3% 12.1% 5.5% -98 dBm 98.0% 98.0% 46.7% 43.1% -115 dBm 75.2% 75.2% 61.0% 36.0% -96 dBm
Lake Pocotopaug, CT 100.0% 100.0% 40.8% 18.5% -97 dBm 100.0% 100.0% 67.7% 60.0% -115 dBm 100.0% 100.0% 99.2% 90.8% -86 dBm
Middle Haddam, CT 96.3% 96.3% 17.3% 5.7% -98 dBm 95.8% 95.8% 55.3% 45.3% -116 dBm 93.3% 93.2% 86.8% 57.4% -93 dBm
Middlefield, CT 100.0% 100.0% 83.5% 64.6% -89 dBm 100.0% 100.0% 76.2% 54.6% -111 dBm 99.2% 99.2% 98.1% 80.4% -88 dBm
Middletown, CT 100.0% 100.0% 73.2% 52.9% -90 dBm 99.6% 99.5% 83.1% 64.2% -111 dBm 99.5% 99.5% 97.7% 81.2% -88 dBm
Moodus, CT 94.0% 94.0% 0.0% 0.0% -94 dBm 98.8% 98.8% 71.1% 55.4% -113 dBm 97.6% 97.6% 75.9% 44.6% -96 dBm
Old Lyme, CT 92.5% 92.5% 10.7% 5.2% -95 dBm 94.3% 94.3% 58.5% 42.7% -115 dBm 92.7% 92.7% 78.8% 49.4% -94 dBm
Old Saybrook, CT 100.0% 100.0% 51.1% 28.3% -91 dBm 99.5% 99.5% 87.9% 71.2% -110 dBm 98.1% 98.1% 90.9% 73.4% -88 dBm
Old Saybrook Center, CT 100.0% 100.0% 72.3% 38.3% -94 dBm 100.0% 100.0% 100.0% 95.7% -100 dBm 100.0% 100.0% 100.0% 100.0% -80 dBm
Portland, CT 100.0% 100.0% 91.1% 76.0% -90 dBm 98.6% 98.6% 89.7% 68.5% -112 dBm 100.0% 100.0% 100.0% 91.1% -87 dBm
Saybrook Manor, CT 100.0% 100.0% 64.7% 47.1% -90 dBm 100.0% 100.0% 100.0% 82.4% -109 dBm 100.0% 100.0% 100.0% 88.2% -94 dBm
South Lyme, CT 92.5% 92.5% 10.7% 5.2% -95 dBm 94.3% 94.3% 58.5% 42.7% -115 dBm 92.7% 92.7% 78.8% 49.4% -94 dBm
Westbrook, CT 99.7% 99.7% 33.2% 21.4% -93 dBm 98.7% 98.7% 75.7% 62.7% -113 dBm 88.5% 88.5% 72.8% 52.2% -93 dBm
Westbrook Center, CT 100.0% 100.0% 93.0% 72.1% -89 dBm 100.0% 100.0% 100.0% 88.4% -103 dBm 100.0% 100.0% 100.0% 97.7% -82 dBm
Meriden, CT 100.0% 100.0% 76.9% 58.9% -89 dBm 99.5% 99.5% 95.7% 63.5% -105 dBm 99.8% 99.8% 99.8% 92.5% -83 dBm
Northford, CT 100.0% 100.0% 66.0% 39.2% -91 dBm 99.5% 99.5% 88.7% 57.7% -112 dBm 99.0% 99.0% 34.0% 25.8% -93 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 Lower Connecticut River Valley 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.