Williamsburg County, SC Cell Phone Coverage Map & Network Rankings (2026)

Find the best cell phone network and plan to use in Williamsburg County, SC

Coverage rankings for Williamsburg County, SC

T-Mobile currently ranks first for coverage in this area, with a coverage score of 79.4. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.

RankCarrierScoreOverall4G LTE5GFast 5GAverage Signal
1T-Mobile79.485.6%85.6%76.0%49.4% -93 dBm
2AT&T52.297.6%97.6%0.3%0.2% -108 dBm
3Verizon45.375.8%75.8%2.4%1.2% -100 dBm

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

Cell phone coverage map for Williamsburg County, SC

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 Williamsburg County, SC

#1

T-Mobile

Coverage Score 79.4
In Williamsburg County, SC
Overall
85.6%
4G LTE
85.6%
5G
76.0%
Fast 5G
49.4%
Average Signal -93 dBm
#2

AT&T

Coverage Score 52.2
In Williamsburg County, SC
Overall
97.6%
4G LTE
97.6%
5G
0.3%
Fast 5G
0.2%
Average Signal -108 dBm
#3

Verizon

Coverage Score 45.3
In Williamsburg County, SC
Overall
75.8%
4G LTE
75.8%
5G
2.4%
Fast 5G
1.2%
Average Signal -100 dBm
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Coverage by city in Williamsburg County, SC

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

CityVerizonAT&TT-Mobile
Cades, SC 81.7% 81.7% 0.0% 0.0% -97 dBm 97.2% 97.2% 0.0% 0.0% -109 dBm 65.3% 65.3% 54.8% 38.9% -93 dBm
Greeleyville, SC 100.0% 100.0% 17.1% 5.7% -96 dBm 100.0% 100.0% 0.0% 0.0% -93 dBm 100.0% 100.0% 100.0% 100.0% -78 dBm
Hemingway, SC 100.0% 100.0% 0.0% 0.0% -82 dBm 100.0% 100.0% 0.0% 0.0% -89 dBm 100.0% 100.0% 100.0% 100.0% -72 dBm
Kingstree, SC 100.0% 100.0% 59.3% 48.8% -88 dBm 100.0% 100.0% 0.0% 0.0% -95 dBm 100.0% 100.0% 100.0% 98.8% -81 dBm
Lane, SC 100.0% 100.0% 1.8% 0.0% -90 dBm 100.0% 100.0% 0.0% 0.0% -97 dBm 100.0% 100.0% 100.0% 100.0% -80 dBm
Nesmith, SC 33.0% 33.0% 0.0% 0.0% -103 dBm 97.8% 97.8% 0.0% 0.0% -111 dBm 88.5% 88.5% 75.3% 43.4% -95 dBm
Salters, SC 95.1% 95.1% 4.9% 2.8% -95 dBm 99.3% 99.3% 0.0% 0.0% -107 dBm 97.9% 97.9% 90.9% 65.3% -91 dBm
Stuckey, SC 96.2% 96.2% 0.0% 0.0% -110 dBm 100.0% 100.0% 0.0% 0.0% -105 dBm 100.0% 100.0% 100.0% 76.9% -92 dBm
Andrews, SC 100.0% 100.0% 0.0% 0.0% -77 dBm 100.0% 100.0% 91.9% 64.5% -109 dBm 100.0% 100.0% 100.0% 98.4% -85 dBm
Johnsonville, SC 100.0% 100.0% 0.0% 0.0% -88 dBm 100.0% 100.0% 0.0% 0.0% -96 dBm 100.0% 100.0% 100.0% 100.0% -81 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 Williamsburg County, SC 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.