Carrierlytics State Coverage Guide

Idaho Cell Phone Coverage Map & Network Rankings (2026)

Find the best cell phone network and plan to use in Idaho.

Using FCC mobile coverage data across cities, counties, and ZIP codes in Idaho, Carrierlytics compares the top-performing networks and the cheapest plans that use them.



Cell phone coverage map for Idaho

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 Idaho

#1

T-Mobile

Coverage Score 49.7
In Idaho
Overall
38.8%
4G LTE
37.5% avg. -94 dBm 4G LTE signal where 4G LTE coverage exists: avg. -94 dBm
5G
35.3% avg. -90 dBm 5G signal where 5G coverage exists: avg. -90 dBm
Fast 5G
26.5% avg. -86 dBm Fast 5G signal where Fast 5G coverage exists: avg. -86 dBm
#2

Verizon

Coverage Score 39.5
In Idaho
Overall
44.9%
4G LTE
44.9% avg. -98 dBm 4G LTE signal where 4G LTE coverage exists: avg. -98 dBm
5G
11.8% avg. -94 dBm 5G signal where 5G coverage exists: avg. -94 dBm
Fast 5G
6.4% avg. -89 dBm Fast 5G signal where Fast 5G coverage exists: avg. -89 dBm
#3

AT&T

Coverage Score 33.2
In Idaho
Overall
45.2%
4G LTE
45.2% avg. -109 dBm 4G LTE signal where 4G LTE coverage exists: avg. -109 dBm
5G
24.3% avg. -114 dBm 5G signal where 5G coverage exists: avg. -114 dBm
Fast 5G
16.2% avg. -113 dBm Fast 5G signal where Fast 5G coverage exists: avg. -113 dBm
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Coverage by county in Idaho

Counties are shown for statewide comparison. Coverage percentages use land-area only coverage.

County Verizon AT&T T-Mobile
Ada County, ID 96.7% 96.7% 53.5% 41.8% 91.8% 91.7% 59.4% 34.7% 94.4% 89.9% 93.2% 77.8%
Adams County, ID 57.3% 57.1% 9.4% 5.8% 49.0% 49.0% 14.4% 10.2% 35.2% 35.2% 22.8% 16.7%
Bannock County, ID 84.7% 84.6% 18.4% 13.1% 80.2% 80.1% 26.0% 17.8% 71.2% 69.8% 68.4% 57.6%
Bear Lake County, ID 55.8% 55.5% 10.1% 3.8% 53.3% 53.3% 26.3% 23.1% 44.3% 44.2% 38.7% 28.0%
Benewah County, ID 38.9% 38.9% 1.3% 0.1% 44.3% 44.3% 28.9% 23.8% 37.6% 37.6% 30.9% 22.7%
Bingham County, ID 79.4% 79.4% 31.8% 12.7% 80.9% 80.8% 46.1% 28.6% 74.0% 73.4% 69.8% 53.9%
Blaine County, ID 55.3% 55.3% 8.0% 4.0% 46.3% 46.3% 15.0% 10.7% 40.4% 37.8% 32.7% 20.4%
Boise County, ID 36.3% 36.3% 3.6% 2.2% 23.0% 22.9% 8.4% 6.4% 17.8% 17.2% 15.9% 9.7%
Bonner County, ID 62.3% 62.3% 1.0% 0.5% 50.4% 50.4% 40.5% 31.5% 35.1% 34.8% 30.0% 19.4%
Bonneville County, ID 68.6% 68.6% 24.2% 14.6% 65.5% 65.5% 35.8% 20.0% 56.2% 55.1% 53.5% 42.5%
Boundary County, ID 37.0% 37.0% 1.0% 0.5% 38.9% 38.9% 29.3% 26.2% 29.9% 29.8% 24.4% 15.0%
Butte County, ID 59.4% 59.4% 13.2% 4.0% 57.6% 57.6% 7.1% 3.6% 50.2% 48.6% 48.1% 34.9%
Camas County, ID 52.6% 52.6% 0.0% 0.0% 45.7% 45.7% 3.6% 3.0% 40.0% 36.9% 37.6% 28.9%
Canyon County, ID 99.5% 99.5% 80.0% 67.4% 97.6% 97.4% 87.8% 57.1% 99.2% 98.8% 99.0% 94.8%
Caribou County, ID 46.9% 46.9% 8.0% 4.7% 40.5% 40.5% 11.5% 10.4% 37.9% 37.6% 30.1% 25.0%
Cassia County, ID 67.7% 67.7% 22.6% 10.8% 76.8% 76.8% 47.4% 21.3% 66.7% 64.7% 64.7% 56.0%
Clark County, ID 56.5% 56.5% 0.9% 0.0% 61.0% 61.0% 11.6% 2.8% 43.1% 34.3% 39.6% 25.3%
Clearwater County, ID 5.3% 5.3% 0.0% 0.0% 8.4% 8.3% 2.9% 2.5% 9.1% 9.1% 6.5% 4.4%
Custer County, ID 0.0% 0.0% 0.0% 0.0% 10.2% 10.2% 4.5% 3.0% 5.8% 5.7% 5.3% 4.1%
Elmore County, ID 55.2% 55.2% 13.4% 7.6% 54.8% 54.8% 39.8% 34.6% 48.8% 46.6% 47.4% 37.9%
Franklin County, ID 61.3% 61.1% 29.1% 19.6% 53.2% 53.1% 28.8% 24.4% 50.6% 48.5% 47.0% 35.8%
Fremont County, ID 80.0% 79.9% 30.8% 13.0% 77.8% 77.8% 28.7% 9.4% 72.4% 70.1% 68.4% 48.1%
Gem County, ID 79.6% 79.6% 23.5% 12.0% 47.2% 47.2% 27.3% 20.4% 63.7% 62.8% 61.1% 48.6%
Gooding County, ID 95.1% 95.0% 50.3% 24.5% 91.7% 91.6% 52.5% 31.8% 90.1% 89.3% 89.1% 79.0%
Idaho County, ID 12.5% 12.5% 0.3% 0.2% 11.3% 11.3% 7.1% 6.7% 9.1% 9.1% 6.8% 4.5%
Jefferson County, ID 99.6% 99.6% 59.2% 30.5% 99.1% 99.1% 62.4% 38.8% 97.2% 97.0% 94.9% 80.9%
Jerome County, ID 100.0% 100.0% 53.0% 27.7% 99.7% 99.5% 89.7% 45.3% 99.7% 99.7% 99.1% 92.3%
Kootenai County, ID 72.4% 72.3% 26.9% 19.8% 66.2% 66.1% 50.2% 31.8% 59.6% 59.5% 52.4% 38.7%
Latah County, ID 64.2% 64.2% 3.4% 1.8% 58.1% 58.1% 38.6% 29.3% 61.3% 61.3% 54.3% 40.3%
Lemhi County, ID 16.9% 16.9% 3.7% 2.2% 26.0% 26.0% 14.4% 11.6% 14.9% 12.7% 13.9% 8.8%
Lewis County, ID 71.7% 71.7% 0.5% 0.4% 69.8% 69.8% 54.9% 46.8% 69.2% 69.2% 51.9% 30.7%
Lincoln County, ID 98.6% 98.6% 9.8% 1.0% 95.5% 95.5% 69.0% 39.4% 94.2% 93.6% 88.7% 68.4%
Madison County, ID 87.8% 87.8% 56.6% 35.9% 89.5% 89.5% 63.3% 25.0% 91.5% 90.9% 88.3% 79.5%
Minidoka County, ID 74.9% 74.9% 34.8% 16.3% 83.7% 83.6% 60.8% 32.9% 69.0% 57.2% 67.4% 46.1%
Nez Perce County, ID 55.1% 55.1% 7.4% 4.0% 58.5% 58.2% 40.1% 24.5% 60.5% 60.5% 50.6% 39.8%
Oneida County, ID 61.0% 61.0% 15.1% 6.8% 75.7% 75.7% 38.3% 35.6% 45.7% 44.0% 43.2% 34.3%
Owyhee County, ID 25.3% 25.2% 5.2% 1.1% 35.5% 35.5% 18.9% 9.2% 24.8% 22.6% 22.3% 9.6%
Payette County, ID 87.9% 87.7% 47.7% 35.3% 81.4% 81.4% 46.3% 41.3% 85.2% 84.5% 81.1% 68.0%
Power County, ID 66.3% 66.3% 22.7% 10.5% 78.4% 78.3% 33.8% 26.4% 63.1% 61.2% 60.5% 44.2%
Shoshone County, ID 14.1% 14.1% 0.5% 0.3% 13.5% 13.5% 7.5% 6.2% 12.3% 12.2% 8.5% 5.7%
Teton County, ID 93.5% 93.5% 39.8% 22.9% 92.0% 92.0% 39.7% 24.8% 88.8% 88.4% 85.8% 75.7%
Twin Falls County, ID 81.6% 81.6% 24.0% 13.3% 79.6% 79.5% 40.9% 27.5% 74.7% 74.0% 71.7% 60.7%
Valley County, ID 24.9% 24.9% 5.6% 3.2% 17.5% 17.5% 8.1% 6.2% 13.5% 13.3% 9.0% 5.9%
Washington County, ID 67.3% 67.1% 9.3% 6.1% 58.9% 58.9% 34.9% 26.5% 45.7% 43.6% 38.0% 25.4%

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 Idaho 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.