Grant County, WA Cell Phone Coverage Map & Network Rankings (2026)

Find the best cell phone network and plan to use in Grant County, WA

Cell phone coverage map for Grant County, WA

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, © OpenMapTiles. Basemap by OpenFreeMap. Rendered with MapLibre. FCC BDC mobile coverage processed by CompareWirelessCarriers.

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Cell phone coverage rankings by network in Grant County, WA

#1

T-Mobile

Coverage Score 88.6
In Grant County, WA
Overall
93.4%
4G LTE
93.4% avg. -91 dBm 4G LTE signal where 4G LTE coverage exists: avg. -91 dBm
5G
86.9% avg. -88 dBm 5G signal where 5G coverage exists: avg. -88 dBm
Fast 5G
73.9% avg. -86 dBm Fast 5G signal where Fast 5G coverage exists: avg. -86 dBm
#2

Verizon

Coverage Score 80.9
In Grant County, WA
Overall
94.0%
4G LTE
93.9% avg. -91 dBm 4G LTE signal where 4G LTE coverage exists: avg. -91 dBm
5G
68.0% avg. -93 dBm 5G signal where 5G coverage exists: avg. -93 dBm
Fast 5G
56.2% avg. -92 dBm Fast 5G signal where Fast 5G coverage exists: avg. -92 dBm
#3

AT&T

Coverage Score 70.1
In Grant County, WA
Overall
93.1%
4G LTE
92.7% avg. -107 dBm 4G LTE signal where 4G LTE coverage exists: avg. -107 dBm
5G
80.7% avg. -111 dBm 5G signal where 5G coverage exists: avg. -111 dBm
Fast 5G
51.6% avg. -109 dBm Fast 5G signal where Fast 5G coverage exists: avg. -109 dBm
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Coverage by city in Grant County, WA

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

CityVerizonAT&TT-Mobile
Banks Lake South, WA 100.0% 100.0% 98.5% 92.4% 100.0% 100.0% 100.0% 90.9% 100.0% 100.0% 100.0% 100.0%
Beverly, WA 100.0% 100.0% 0.0% 0.0% 80.0% 80.0% 80.0% 60.0% 100.0% 100.0% 100.0% 100.0%
Cascade Valley, WA 100.0% 100.0% 100.0% 96.1% 100.0% 100.0% 100.0% 73.8% 100.0% 100.0% 100.0% 100.0%
Coulee City, WA 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 88.0% 100.0% 100.0% 100.0% 100.0%
Crescent Bar, WA 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 96.3% 92.6% 100.0% 100.0% 100.0% 100.0%
Desert Aire, WA 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 83.9% 100.0% 100.0% 100.0% 100.0%
Electric City, WA 100.0% 100.0% 0.0% 0.0% 100.0% 100.0% 98.2% 94.7% 100.0% 100.0% 0.0% 0.0%
Ephrata, WA 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 99.7% 71.3% 100.0% 100.0% 100.0% 100.0%
George, WA 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 97.1% 100.0% 100.0% 100.0% 100.0%
Grand Coulee, WA 100.0% 100.0% 0.0% 0.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 0.0% 0.0%
Hartline, WA 100.0% 100.0% 88.9% 88.9% 100.0% 100.0% 33.3% 22.2% 100.0% 100.0% 22.2% 0.0%
Krupp, WA 94.7% 94.7% 0.0% 0.0% 36.8% 36.8% 0.0% 0.0% 31.6% 31.6% 0.0% 0.0%
Lakeview, WA 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
Marine View, WA 100.0% 100.0% 96.0% 96.0% 100.0% 100.0% 100.0% 48.0% 100.0% 100.0% 100.0% 84.0%
Marlin, WA 89.1% 88.8% 16.0% 3.7% 82.4% 82.3% 37.6% 18.9% 87.3% 87.3% 69.4% 38.5%
Mattawa, WA 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 90.3% 100.0% 100.0% 100.0% 100.0%
Moses Lake, WA 100.0% 100.0% 98.8% 97.1% 100.0% 99.6% 99.8% 74.3% 100.0% 100.0% 100.0% 100.0%
Moses Lake North, WA 100.0% 100.0% 94.8% 90.2% 100.0% 100.0% 100.0% 89.5% 100.0% 100.0% 100.0% 100.0%
Quincy, WA 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 97.8% 67.8% 100.0% 100.0% 100.0% 100.0%
Royal City, WA 100.0% 100.0% 93.9% 90.9% 100.0% 100.0% 100.0% 78.8% 100.0% 100.0% 100.0% 100.0%
Schwana, WA 100.0% 100.0% 0.0% 0.0% 71.4% 71.4% 71.4% 0.0% 100.0% 100.0% 100.0% 100.0%
Soap Lake, WA 100.0% 100.0% 100.0% 97.5% 97.5% 97.5% 87.5% 77.5% 100.0% 100.0% 100.0% 100.0%
Stratford, WA 94.3% 94.3% 48.7% 16.2% 88.2% 87.9% 63.8% 31.9% 98.9% 98.9% 97.7% 89.1%
Sunland Estates, WA 83.3% 83.3% 66.7% 33.3% 75.0% 75.0% 58.3% 50.0% 83.3% 83.3% 41.7% 8.3%
Warden, WA 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
Wheeler, WA 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
Wilson Creek, WA 87.0% 87.0% 0.0% 0.0% 47.8% 47.8% 8.7% 8.7% 65.2% 65.2% 34.8% 13.0%
Coulee Dam, WA 100.0% 100.0% 0.0% 0.0% 100.0% 100.0% 94.7% 94.7% 94.7% 94.7% 0.0% 0.0%

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 2026. “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 Grant County, WA 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.