CoverageMap

Fairfield

Cell coverage comparison in Fairfield, Illinois

US

Based on crowdsourced speed tests and signal measurements in Fairfield, Illinois, the current snapshot reflects less than 10 speed tests and shows medians of 63.6 Mbps download, 10.2 Mbps upload, and 34 ms latency.

Not enough data for Fairfield

We need at least 25 speed tests in Fairfield to generate reliable performance metrics.

Network Performance

Get a complete view of mobile performance across Fairfield with overall benchmarks and carrier-by-carrier breakdowns. Explore median performance metrics calculated from millions of real-world, crowdsourced speed tests. Start with the Fairfield-wide snapshot to understand overall trends, then dive deeper to compare individual carriers side-by-side and see how each performs in speed, responsiveness, and availability.

Median Performance

Download

63.6Mbps

Upload

10.2Mbps

Latency

34ms

Reliability

4.9/ 10

Top Performers

Best Download: T-Mobile

63.6 Mbps

Best Upload: T-Mobile

10.2 Mbps

Best Latency: T-Mobile

34 ms

Best Reliability: T-Mobile

4.2 / 10

Best Coverage: AT&T

100.0%

Coverage Snapshot

5G88.0%
4G LTE100.0%
Not enough tests

Network Performance aggregates all measured carriers in Fairfield to provide a baseline view of typical speeds and latency in the area. Use these medians as a quick indicator of overall network quality.

These medians are calculated from less than 10 tests. Current medians are 63.6 Mbps download, 10.2 Mbps upload, and 34 ms latency.

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Cell Phone Plans for Fairfield

Compare wireless plans from carriers with coverage in this area.

Recommended PlanSponsored

Mint Mobile 5GB Annual

12 month term

T-Mobile
$15/mo
5 GB Data
Hotspot Included
Unlimited min
Unlimited texts
View Plan
Recommended PlanSponsored

US Mobile 5GB

Monthly plan

AT&T
T-Mobile
Verizon
$15/mo
5 GB Data
Hotspot Included
Unlimited min
Unlimited texts
Taxes & fees included
View Plan
Recommended PlanSponsored

US Mobile Unlimited Starter Dark Star

Monthly plan

AT&T
$25/mo
Unlimited Data
20 GB Hotspot
Unlimited min
Unlimited texts
Taxes & fees included
View Plan
Recommended PlanSponsored

Visible Base

Monthly plan

Verizon
$25/mo
Unlimited Data
Unlimited Hotspot
Unlimited min
Unlimited texts
Taxes & fees included
View Plan
Recommended PlanSponsored

Mint Mobile Unlimited Annual

12 month term

T-Mobile
$30/mo
Unlimited Data
20 GB Hotspot
Unlimited min
Unlimited texts
Limited-time offer

$15/mo first year

View Plan
Recommended PlanSponsored

Visible+

Monthly plan

Verizon
$35/mo
Unlimited Data
Unlimited Hotspot
Unlimited min
Unlimited texts
Taxes & fees included
Limited-time offer

$30/mo for 5 years with code 5OFF5

View Plan

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Cell Coverage in Fairfield: FAQ

What is the best cell phone carrier in Fairfield?

We don't yet have enough speed tests in Fairfield to rank carriers. Once we reach 25 tests, we'll publish local rankings.

Why might this page show limited data for Fairfield?

We need at least 25 recent speed tests to generate reliable local metrics. If we don't have enough tests yet, the page focuses on maps and nearby locations while we keep collecting data.

What is the reliability score?

The reliability score summarizes how dependable mobile performance is in Fairfield. It uses a 0.0 to 10.0 scale (higher is better) and is calculated from real-world speed test percentiles with weighted components: download (50%), latency (30%), and upload (20%). It evaluates the lower-end experience using the bottom 10%, 5%, and 1% percentiles when enough samples are available. If local speed testing is limited, a coverage-based fallback is used from signal quality distribution (great/good/poor).

How can I check coverage at my specific address in Fairfield?

Use the interactive map to check signal strength at your exact address. Visit the CoverageMap interactive map to explore 4G/5G availability.

How can I contribute coverage data for Fairfield?

Download the CoverageMap app and run a few speed tests with location enabled. Your results help improve coverage accuracy and unlock local rankings faster.

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View Interactive Map

Explore detailed coverage data for Fairfield on our interactive map.

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Test coverage at your location and contribute to our crowdsourced data.

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