CoverageMap

Grenville

Cell coverage comparison in Grenville, South Dakota

US

Based on crowdsourced speed tests and signal measurements in Grenville, South Dakota using data from Day, the current snapshot reflects over 100 speed tests and shows medians of 18.0 Mbps download, 5.1 Mbps upload, and 60 ms latency.

Not enough data for Grenville

Showing performance data for Day instead. We need at least 25 speed tests in Grenville to generate local metrics.

Performance by Carrier in Day

Explore median download speeds, upload performance, and network latency for each major mobile carrier in Day, calculated from millions of real-world, crowdsourced speed tests. These results reflect typical everyday performance to help you compare carriers and choose the network that delivers the fastest speeds, most responsive connections, and broadest coverage where you live, work, and travel.

AT&T logo
Down
No data
Up
No data
Reliab.
No data
Cov.
100.0%
View CarrierSee Plans
T-Mobile logo
Down
327.6Mbps
Up
3.9Mbps
Reliab.
4.4/ 10
Cov.
100.0%

Less than 10 tests conducted

View CarrierSee Plans
Verizon logo
Down
17.7Mbps
Up
5.1Mbps
Reliab.
5.2/ 10
Cov.
100.0%

Over 100 tests conducted

View CarrierSee Plans

Performance by Carrier shows side-by-side results for the primary mobile providers measured in Day. Each row reflects download, upload, latency, and reliability for that carrier.

Providers included in this comparison are AT&T, T-Mobile, Verizon. Per-carrier test counts are shown in the table to indicate data accuracy.

Promoted Offers

Mint Mobile

Get the 5GB plan for $10/mo for your first 3 months

Regular price $25/month for 3 months

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Visible

Get Visible+ for $30/mo with code 5OFF5

Get $5 off for up to 5 years. New customers only.

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Network Performance

Get a complete view of mobile performance across Day with overall benchmarks and carrier-by-carrier breakdowns. Explore median performance metrics calculated from millions of real-world, crowdsourced speed tests. Start with the Day-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

18.0Mbps

Upload

5.1Mbps

Latency

60ms

Reliability

5.2/ 10

Top Performers

Best Download: T-Mobile

327.6 Mbps

Best Upload: Verizon

5.1 Mbps

Best Latency: Verizon

60 ms

Best Reliability: Verizon

5.2 / 10

Best Coverage: AT&T

100.0%

Coverage Snapshot

5G100.0%
4G LTE100.0%
Based on 19 speed tests

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

Local testing in Grenville is limited, so these medians are based on data from Day. Current medians are 18.0 Mbps download, 5.1 Mbps upload, and 60 ms latency.

Promoted Offers

Mint Mobile

Get the 5GB plan for $10/mo for your first 3 months

Regular price $25/month for 3 months

See Deal
Visible

Get Visible+ for $30/mo with code 5OFF5

Get $5 off for up to 5 years. New customers only.

See Deal

Cell Phone Plans for Grenville

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 Grenville: FAQ

What is the best cell phone carrier in Grenville?

Based on crowdsourced speed tests in Day, T-Mobile currently leads in median download speeds. Compare carriers in the performance table above for the latest results.

Why might this page show limited data for Grenville?

We need at least 25 recent speed tests to generate reliable local metrics. Until we reach that threshold in Grenville, we show performance data for Day when it is available.

What is the reliability score?

The reliability score summarizes how dependable mobile performance is in Day. 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 Grenville?

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 Grenville?

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 Grenville on our interactive map.

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

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