Carrierlytics City Coverage Guide

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

Don't overpay for a network that struggles where you actually use your phone.

Using FCC mobile coverage data across Winnsboro, SC ZIP codes, Carrierlytics compares the top-performing networks and the cheapest plans that use them.



Cell phone coverage map for Winnsboro, 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 Carrierlytics.

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Cell phone coverage rankings by network in Winnsboro, SC

#1

T-Mobile

Coverage Score 88.9
In Winnsboro, SC
Overall
99.4%
4G LTE
99.4% avg. -96 dBm 4G LTE signal where 4G LTE coverage exists: avg. -96 dBm
5G
96.9% avg. -92 dBm 5G signal where 5G coverage exists: avg. -92 dBm
Fast 5G
69.9% avg. -89 dBm Fast 5G signal where Fast 5G coverage exists: avg. -89 dBm
Fairfield County, SC covered 56.2%
#2

AT&T

Coverage Score 82.0
In Winnsboro, SC
Overall
100.0%
4G LTE
100.0% avg. -99 dBm 4G LTE signal where 4G LTE coverage exists: avg. -99 dBm
5G
100.0% avg. -107 dBm 5G signal where 5G coverage exists: avg. -107 dBm
Fast 5G
88.3% avg. -106 dBm Fast 5G signal where Fast 5G coverage exists: avg. -106 dBm
Fairfield County, SC covered 93.3%
#3

Verizon

Coverage Score 75.7
In Winnsboro, SC
Overall
100.0%
4G LTE
100.0% avg. -87 dBm 4G LTE signal where 4G LTE coverage exists: avg. -87 dBm
5G
44.8% avg. -89 dBm 5G signal where 5G coverage exists: avg. -89 dBm
Fast 5G
32.5% avg. -85 dBm Fast 5G signal where Fast 5G coverage exists: avg. -85 dBm
Fairfield County, SC covered 97.5%

County coverage is shown for surrounding-area context and uses land-area only coverage.

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Best phone plans for Winnsboro, SC

Best phone plans on T-Mobile's network for Winnsboro, SC

88.9 T-Mobile coverage score Ranked #1 in Winnsboro, SC
See all plans on T-Mobile Compare all phone plans

Coverage by ZIP code in Winnsboro, SC

ZIP code areas can extend beyond city limits, so this table is best used for local comparison around the city.

ZIP Code AT&T T-Mobile Verizon
29130 88.2% 88.2% 34.6% 25.1% 41.8% 41.8% 36.6% 23.3% 99.5% 99.5% 16.9% 8.6%
29180 97.6% 97.6% 59.5% 41.3% 71.9% 71.9% 60.2% 36.1% 99.3% 99.3% 15.4% 8.5%

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 Winnsboro, 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.