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

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

Coverage rankings for McCormick County, SC

Verizon currently ranks first for coverage in this area, with a coverage score of 49.0. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.

RankCarrierScoreOverall4G LTE5GFast 5GAverage Signal
1Verizon49.081.4%81.4%6.0%3.3% -101 dBm
2AT&T44.865.0%64.9%21.7%16.1% -115 dBm
3T-Mobile33.030.8%30.7%22.8%11.6% -98 dBm

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

Cell phone coverage map for McCormick 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 McCormick County, SC

#1

Verizon

Coverage Score 49.0
In McCormick County, SC
Overall
81.4%
4G LTE
81.4%
5G
6.0%
Fast 5G
3.3%
Average Signal -101 dBm
#2

AT&T

Coverage Score 44.8
In McCormick County, SC
Overall
65.0%
4G LTE
64.9%
5G
21.7%
Fast 5G
16.1%
Average Signal -115 dBm
#3

T-Mobile

Coverage Score 33.0
In McCormick County, SC
Overall
30.8%
4G LTE
30.7%
5G
22.8%
Fast 5G
11.6%
Average Signal -98 dBm
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Coverage by city in McCormick County, SC

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

CityVerizonAT&TT-Mobile
Clarks Hill, SC 100.0% 100.0% 56.8% 36.4% -91 dBm 28.4% 28.4% 0.0% 0.0% -119 dBm 3.4% 3.4% 0.0% 0.0% -103 dBm
McCormick, SC 100.0% 100.0% 1.8% 0.0% -99 dBm 100.0% 100.0% 99.1% 94.6% -113 dBm 95.5% 95.5% 88.3% 71.2% -87 dBm
Modoc, SC 100.0% 100.0% 2.9% 1.0% -91 dBm 100.0% 100.0% 0.0% 0.0% -103 dBm 100.0% 100.0% 100.0% 91.2% -87 dBm
Mount Carmel, SC 25.8% 25.8% 0.0% 0.0% -113 dBm 6.1% 6.1% 0.4% 0.0% -120 dBm 0.8% 0.8% 0.8% 0.0% -100 dBm
Parksville, SC 100.0% 100.0% 0.0% 0.0% -98 dBm 100.0% 100.0% 0.0% 0.0% -110 dBm 75.0% 75.0% 40.0% 5.0% -103 dBm
Plum Branch, SC 100.0% 100.0% 0.0% 0.0% -90 dBm 100.0% 100.0% 0.0% 0.0% -104 dBm 100.0% 100.0% 90.0% 45.0% -97 dBm
Willington, SC 28.8% 28.8% 0.0% 0.0% -110 dBm 8.1% 7.5% 1.9% 0.0% -119 dBm N/A N/A N/A N/A N/A
Bradley, SC 93.5% 93.5% 0.0% 0.0% -99 dBm 100.0% 100.0% 99.1% 85.5% -113 dBm 82.7% 82.7% 65.4% 24.3% -100 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 McCormick 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.