Lummi Island, WA 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 Lummi Island, WA zip codes, this guide compares the top-performing networks and the cheapest plans that use them.



Cell phone coverage map for Lummi Island, 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.

Loading coverage map...


Cell phone coverage rankings by network in Lummi Island, WA

#1

T-Mobile

Coverage Score 75.0
In Lummi Island, WA
Overall
86.5%
4G LTE
86.5% avg. -97 dBm 4G LTE signal where 4G LTE coverage exists: avg. -97 dBm
5G
80.1% avg. -95 dBm 5G signal where 5G coverage exists: avg. -95 dBm
Fast 5G
39.0% avg. -90 dBm Fast 5G signal where Fast 5G coverage exists: avg. -90 dBm
Whatcom County, WA covered 29.7%
#2

AT&T

Coverage Score 67.7
In Lummi Island, WA
Overall
95.9%
4G LTE
95.9% avg. -108 dBm 4G LTE signal where 4G LTE coverage exists: avg. -108 dBm
5G
85.0% avg. -113 dBm 5G signal where 5G coverage exists: avg. -113 dBm
Fast 5G
40.4% avg. -111 dBm Fast 5G signal where Fast 5G coverage exists: avg. -111 dBm
Whatcom County, WA covered 35.4%
#3

Verizon

Coverage Score 58.4
In Lummi Island, WA
Overall
100.0%
4G LTE
100.0% avg. -99 dBm 4G LTE signal where 4G LTE coverage exists: avg. -99 dBm
5G
34.5% avg. -102 dBm 5G signal where 5G coverage exists: avg. -102 dBm
Fast 5G
3.0% avg. -96 dBm Fast 5G signal where Fast 5G coverage exists: avg. -96 dBm
Whatcom County, WA covered 37.0%

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

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 ZIP code in Lummi Island, WA

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

ZIP CodeAT&TT-MobileVerizon
98262 95.9% 95.9% 85.0% 40.4% 86.5% 86.5% 80.1% 39.0% 100.0% 100.0% 34.5% 3.0%

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 Lummi Island, 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.