Coverage rankings for Charleston County, SC
Verizon currently ranks first for coverage in this area, with a coverage score of 86.7. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.
| Rank | Carrier | Score | Overall | 4G LTE | 5G | Fast 5G | Average Signal |
|---|---|---|---|---|---|---|---|
| 1 | Verizon | 86.7 | 97.2% | 97.1% | 85.1% | 63.1% | -101 dBm |
| 2 | T-Mobile | 79.3 | 80.4% | 80.3% | 73.7% | 58.2% | -90 dBm |
| 3 | AT&T | 60.6 | 92.2% | 92.2% | 30.2% | 19.1% | -111 dBm |
Scores include coverage area, network type, and average signal strength.
Cell phone coverage map for Charleston 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.
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 Charleston County, SC
Verizon
- Overall
- 97.2%
- 4G LTE
- 97.1%
- 5G
- 85.1%
- Fast 5G
- 63.1%
T-Mobile
- Overall
- 80.4%
- 4G LTE
- 80.3%
- 5G
- 73.7%
- Fast 5G
- 58.2%
AT&T
- Overall
- 92.2%
- 4G LTE
- 92.2%
- 5G
- 30.2%
- Fast 5G
- 19.1%
Coverage varies by neighborhood. Your carrier shouldn’t.
US Mobile lets you switch between all three major networks, so you can choose the one that works best where you actually use your phone.
Pricing, network access, switching terms, and home internet availability may vary.
Coverage by city in Charleston County, SC
Cities and towns are shown for county-level comparison. Coverage percentages use land-area only coverage.
| City | Verizon | AT&T | T-Mobile |
|---|---|---|---|
| Adams Run, SC | 100.0% 100.0% 100.0% 17.5% -111 dBm | 100.0% 100.0% 0.0% 0.0% -112 dBm | 37.5% 37.5% 2.5% 0.0% -109 dBm |
| Awendaw, SC | 100.0% 100.0% 70.7% 61.1% -96 dBm | 100.0% 100.0% 8.9% 4.0% -108 dBm | 95.0% 95.0% 81.7% 55.9% -94 dBm |
| Charleston, SC | 99.8% 99.8% 95.8% 83.9% -93 dBm | 96.3% 96.2% 69.4% 41.0% -111 dBm | 94.3% 94.3% 91.5% 82.2% -85 dBm |
| Charleston Afb, SC | 100.0% 100.0% 100.0% 93.0% -92 dBm | 100.0% 100.0% 95.8% 69.9% -106 dBm | 100.0% 100.0% 100.0% 97.9% -82 dBm |
| Edisto Island, SC | 99.7% 99.5% 93.7% 69.4% -103 dBm | 97.1% 97.1% 28.9% 24.3% -114 dBm | 80.4% 80.3% 69.8% 47.7% -94 dBm |
| Folly Beach, SC | 100.0% 100.0% 100.0% 96.8% -92 dBm | 98.0% 98.0% 84.8% 33.2% -113 dBm | 99.1% 99.1% 99.1% 96.2% -86 dBm |
| Hollywood, SC | 100.0% 100.0% 89.0% 54.8% -103 dBm | 99.7% 99.7% 14.5% 13.0% -108 dBm | 98.3% 98.3% 91.7% 61.6% -93 dBm |
| Isle Of Palms, SC | 100.0% 100.0% 100.0% 100.0% -86 dBm | 96.0% 96.0% 90.5% 73.8% -104 dBm | 96.0% 96.0% 96.0% 93.7% -79 dBm |
| James Island, SC | 100.0% 100.0% 98.6% 91.5% -92 dBm | 97.9% 97.9% 73.0% 51.8% -110 dBm | 98.6% 98.6% 98.6% 95.0% -81 dBm |
| Johns Island, SC | 99.9% 99.8% 94.9% 70.2% -101 dBm | 99.5% 99.5% 32.4% 18.5% -108 dBm | 96.6% 96.4% 92.9% 77.7% -88 dBm |
| Kiawah Island, SC | 99.7% 99.7% 91.3% 57.4% -104 dBm | 99.4% 99.4% 63.5% 35.5% -109 dBm | 99.0% 99.0% 98.1% 88.1% -85 dBm |
| Lincolnville, SC | 100.0% 100.0% 100.0% 100.0% -88 dBm | 100.0% 100.0% 67.6% 23.5% -114 dBm | 100.0% 100.0% 100.0% 100.0% -80 dBm |
| McClellanville, SC | 100.0% 100.0% 100.0% 100.0% -91 dBm | 100.0% 100.0% 0.0% 0.0% -105 dBm | 100.0% 100.0% 100.0% 78.5% -91 dBm |
| Meggett, SC | 99.4% 99.4% 72.7% 37.5% -105 dBm | 100.0% 100.0% 39.2% 32.7% -112 dBm | 98.0% 98.0% 86.5% 54.8% -94 dBm |
| Mount Pleasant, SC | 100.0% 100.0% 98.3% 88.3% -94 dBm | 99.2% 99.2% 78.0% 51.9% -111 dBm | 99.6% 98.9% 99.3% 89.4% -85 dBm |
| North Charleston, SC | 99.4% 99.4% 96.2% 88.6% -89 dBm | 98.9% 98.9% 72.6% 49.9% -108 dBm | 96.5% 96.5% 94.2% 88.7% -80 dBm |
| Ravenel, SC | 100.0% 100.0% 99.1% 76.7% -103 dBm | 100.0% 100.0% 0.6% 0.6% -105 dBm | 99.4% 99.4% 94.1% 66.1% -92 dBm |
| Rockville, SC | 100.0% 100.0% 90.9% 18.2% -113 dBm | 100.0% 100.0% 0.0% 0.0% -115 dBm | 100.0% 100.0% 72.7% 54.5% -94 dBm |
| Seabrook Island, SC | 100.0% 100.0% 64.5% 45.6% -99 dBm | 99.4% 99.4% 16.0% 13.6% -104 dBm | 99.4% 99.4% 99.4% 95.3% -83 dBm |
| Sullivan’s Island, SC | 100.0% 100.0% 100.0% 100.0% -88 dBm | 97.1% 97.1% 91.4% 52.9% -112 dBm | 97.1% 97.1% 97.1% 97.1% -79 dBm |
| Sullivans Island, SC | 100.0% 100.0% 100.0% 100.0% -88 dBm | 97.1% 97.1% 91.4% 52.9% -112 dBm | 97.1% 97.1% 97.1% 97.1% -79 dBm |
| Wadmalaw Island, SC | 94.6% 94.4% 74.7% 38.0% -107 dBm | 93.7% 93.7% 7.1% 4.2% -115 dBm | 68.1% 68.1% 55.7% 34.1% -95 dBm |
| Goose Creek, SC | 100.0% 100.0% 90.4% 67.5% -98 dBm | 99.2% 99.2% 62.4% 43.2% -111 dBm | 94.9% 94.9% 84.3% 64.1% -91 dBm |
| Hanahan, SC | 100.0% 100.0% 100.0% 95.3% -89 dBm | 100.0% 100.0% 94.3% 64.5% -108 dBm | 100.0% 100.0% 100.0% 99.3% -80 dBm |
| Ladson, SC | 100.0% 100.0% 100.0% 100.0% -83 dBm | 100.0% 100.0% 92.3% 70.3% -105 dBm | 100.0% 100.0% 100.0% 100.0% -77 dBm |
| Summerville, SC | 100.0% 100.0% 100.0% 99.1% -86 dBm | 99.5% 99.5% 84.8% 61.6% -107 dBm | 100.0% 100.0% 100.0% 99.2% -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 Charleston 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.