Janesville, WI 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 Janesville, WI zip codes, this guide compares the top-performing networks and the cheapest plans that use them.

Coverage rankings for Janesville, WI

T-Mobile currently ranks first for coverage in this area, with a coverage score of 98.3. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.


RankCarrierScoreOverall4G LTE5GFast 5GAverage Signal
1T-Mobile98.3100.0%100.0%99.5%94.4% -83 dBm
2AT&T89.2100.0%99.8%98.9%63.8% -101 dBm
3Verizon88.6100.0%100.0%76.6%58.1% -89 dBm

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


Cell phone coverage map for Janesville, WI

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.

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Cell phone coverage by network in Janesville, WI

#1

T-Mobile

Coverage Score 98.3
In Janesville, WI
Overall
100.0%
4G LTE
100.0%
5G
99.5%
Fast 5G
94.4%
Average Signal -83 dBm
Rock County, WI covered 89.2%
#2

AT&T

Coverage Score 89.2
In Janesville, WI
Overall
100.0%
4G LTE
99.8%
5G
98.9%
Fast 5G
63.8%
Average Signal -101 dBm
Rock County, WI covered 96.6%
#3

Verizon

Coverage Score 88.6
In Janesville, WI
Overall
100.0%
4G LTE
100.0%
5G
76.6%
Fast 5G
58.1%
Average Signal -89 dBm
Rock County, WI covered 99.5%

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

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Coverage by ZIP code in Janesville, WI

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

ZIP CodeAT&TT-MobileVerizon
53545 95.7% 95.2% 86.8% 52.8% -107 dBm 95.2% 95.2% 87.7% 69.7% -88 dBm 99.1% 99.1% 53.2% 45.4% -90 dBm
53546 96.6% 96.2% 91.4% 40.7% -107 dBm 98.7% 98.7% 96.1% 84.6% -87 dBm 100.0% 100.0% 65.5% 35.6% -91 dBm
53548 97.5% 97.5% 86.2% 50.6% -111 dBm 93.8% 93.8% 88.6% 72.7% -89 dBm 97.7% 97.7% 25.8% 10.7% -97 dBm
53563 97.5% 97.4% 84.8% 41.1% -111 dBm 98.1% 98.1% 93.9% 72.3% -89 dBm 99.9% 99.9% 35.9% 19.8% -92 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 Janesville, WI 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.