Union County, NM Cell Phone Coverage Map & Network Rankings (2026)

Find the best cell phone network and plan to use in Union County, NM

Coverage rankings for Union County, NM

AT&T currently ranks first for coverage in this area, with a coverage score of 62.3. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.

RankCarrierScoreOverall4G LTE5GFast 5GAverage Signal
1AT&T62.387.2%87.2%31.5%31.3% -112 dBm
2T-Mobile52.754.2%53.9%43.4%27.4% -96 dBm
3Verizon38.254.9%54.8%9.1%4.9% -101 dBm

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

Cell phone coverage map for Union County, NM

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.

Loading coverage map...

Cell phone coverage by network in Union County, NM

#1

AT&T

Coverage Score 62.3
In Union County, NM
Overall
87.2%
4G LTE
87.2%
5G
31.5%
Fast 5G
31.3%
Average Signal -112 dBm
#2

T-Mobile

Coverage Score 52.7
In Union County, NM
Overall
54.2%
4G LTE
53.9%
5G
43.4%
Fast 5G
27.4%
Average Signal -96 dBm
#3

Verizon

Coverage Score 38.2
In Union County, NM
Overall
54.9%
4G LTE
54.8%
5G
9.1%
Fast 5G
4.9%
Average Signal -101 dBm
Sponsored US Mobile

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.

Choose your network
Dark Star Light Speed Warp 5G
Unlimited plans from
$22.50/mo
Phone + home internet bundle from
$47/mo
Shop US Mobile

Pricing, network access, switching terms, and home internet availability may vary.

Coverage by city in Union County, NM

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

CityVerizonAT&TT-Mobile
Amistad, NM 57.4% 57.0% 36.7% 16.2% -99 dBm 99.4% 99.4% 0.1% 0.1% -102 dBm 57.2% 57.1% 42.8% 25.7% -96 dBm
Capulin, NM 100.0% 100.0% 0.0% 0.0% -101 dBm 100.0% 100.0% 100.0% 100.0% -113 dBm 100.0% 100.0% 97.1% 60.0% -99 dBm
Clayton, NM 100.0% 100.0% 0.0% 0.0% -80 dBm 100.0% 100.0% 100.0% 99.4% -93 dBm 100.0% 100.0% 100.0% 100.0% -78 dBm
Des Moines, NM 100.0% 100.0% 0.0% 0.0% -91 dBm 100.0% 100.0% 100.0% 100.0% -110 dBm 100.0% 100.0% 100.0% 100.0% -90 dBm
Folsom, NM 100.0% 100.0% 0.0% 0.0% -105 dBm 100.0% 100.0% 53.3% 53.3% -120 dBm 60.0% 60.0% 0.0% 0.0% -110 dBm
Gladstone, NM 0.3% 0.3% 0.0% 0.0% -112 dBm 97.4% 97.4% 3.3% 3.2% -105 dBm 71.0% 70.7% 64.1% 51.4% -92 dBm
Grenville, NM 100.0% 100.0% 0.0% 0.0% -110 dBm 100.0% 100.0% 100.0% 100.0% -120 dBm 100.0% 100.0% 100.0% 88.9% -93 dBm
Sedan, NM 94.6% 94.4% 77.8% 56.4% -94 dBm 99.9% 99.9% 23.0% 23.0% -105 dBm 89.9% 89.9% 78.7% 52.1% -93 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 Union County, NM 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.