Carrierlytics City Coverage Guide

Fairmount, MD 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 Fairmount, MD ZIP codes, Carrierlytics compares the top-performing networks and the cheapest plans that use them.



Cell phone coverage map for Fairmount, MD

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 Fairmount, MD

#1

AT&T

Coverage Score 72.7
In Fairmount, MD
Overall
99.4%
4G LTE
99.4% avg. -106 dBm 4G LTE signal where 4G LTE coverage exists: avg. -106 dBm
5G
92.7% avg. -114 dBm 5G signal where 5G coverage exists: avg. -114 dBm
Fast 5G
64.4% avg. -111 dBm Fast 5G signal where Fast 5G coverage exists: avg. -111 dBm
Somerset County, MD covered 94.1%
#2

Verizon

Coverage Score 33.1
In Fairmount, MD
Overall
65.7%
4G LTE
65.7% avg. -98 dBm 4G LTE signal where 4G LTE coverage exists: avg. -98 dBm
5G
0.0%
Fast 5G
0.0%
Somerset County, MD covered 91.2%
#3

T-Mobile

Coverage Score 26.0
In Fairmount, MD
Overall
25.7%
4G LTE
25.7% avg. -105 dBm 4G LTE signal where 4G LTE coverage exists: avg. -105 dBm
5G
11.7% avg. -100 dBm 5G signal where 5G coverage exists: avg. -100 dBm
Fast 5G
0.3% avg. -100 dBm Fast 5G signal where Fast 5G coverage exists: avg. -100 dBm
Somerset County, MD covered 58.1%

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

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Best phone plans for Fairmount, MD

Best phone plans on AT&T's network for Fairmount, MD

72.7 AT&T coverage score Ranked #1 in Fairmount, MD
See all plans on AT&T Compare all phone plans

Coverage by ZIP code in Fairmount, MD

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
21867 100.0% 100.0% 100.0% 100.0% N/A N/A N/A N/A N/A N/A N/A N/A
21871 96.9% 96.9% 78.5% 54.6% 57.6% 57.5% 36.1% 19.4% 91.2% 91.2% 4.3% 1.5%

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 Fairmount, MD 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.