Best Phone Coverage & Plans in Keystone, South Dakota 57751

Discover the best wireless coverage in Keystone, South Dakota, 57751, a vital aspect for residents and visitors alike. This article will guide you in comparing the top carriers – Verizon, T-Mobile, and AT&T – to help you make an informed choice.

We determine the best network using FCC data and crowdsourced insights from a leading network intelligence community.

Best Phone Network in Keystone, SD, 57751

Use our handy coverage checker to compare coverage across multiple locations!

See which network has the best coverage in nearby zips: 57748, 57750, 57752, 57754, 57755

Overview of Phone Networks in Keystone, South Dakota, 57751

Verizon coverage in Keystone, SD, 57751

Verizon provides the best network coverage in Keystone. Users can expect mean speeds around 50 Mbps, with median speeds often reaching 35 Mbps. Latency averages about 30 ms, which is quite good for activities like video calls and online gaming. The 10th percentile speed is around 15 Mbps, while the 90th percentile can go up to 100 Mbps, indicating a strong performance for most users. Verizon has extensive 4G and growing 5G coverage, ensuring a reliable connection. The consistency percentage is high, meaning users can expect stable service most of the time. Multi-server latency and jitter are also low, which helps maintain smooth streaming and quick response times during online activities.

See overview of Verizon coverage in 57751, Keystone, or even South Dakota.

AT&T coverage in Keystone, SD, 57751

AT&T offers decent coverage in Keystone, with mean speeds around 30 Mbps and median speeds close to 25 Mbps. Latency is slightly higher than Verizon, averaging about 40 ms, which can affect real-time activities like gaming. The 10th percentile speed hovers around 10 Mbps, while the top 90th percentile reaches about 75 Mbps. AT&T has solid 4G coverage, with some areas starting to see 5G service. The consistency percentage is moderate, indicating occasional service interruptions. Latency and jitter levels are manageable, making it suitable for everyday tasks, though users may experience some delays during peak times.

See overview of AT&T coverage in 57751, Keystone, or even South Dakota.

T-Mobile coverage in Keystone, SD, 57751

T-Mobile’s coverage in Keystone is improving but may not be as reliable as Verizon or AT&T. Mean speeds are around 25 Mbps, with median speeds at about 20 Mbps. The average latency is higher, around 50 ms, which might affect video calls and online gaming. The 10th percentile speed is around 8 Mbps, while the 90th percentile can reach 60 Mbps. T-Mobile offers a mix of 4G and some 5G coverage, but it can be spotty in certain areas. The consistency percentage is lower, leading to potential service drops during busy times. Latency and jitter can be more variable, which may impact streaming quality and response times.

See overview of T-Mobile coverage in 57751, Keystone, or even South Dakota.

Access all 3 US networks with US Mobile

US Mobile gives you the flexibility to choose any top-tier networks in the US, to give you the strongest possible signal no matter where you are. As a Super Carrier we blend the reliability and reach of multiple major providers into a single service. This means fewer dropped calls, faster data, and better overall performance—without having to switch carriers. See how it all works and find your seamless coverage here.

Comparison of Premium Unlimited Plans

	AT&T	T-MOBILE	VERIZON	US MOBILE
1 Line	$96/line	$105/line	$100/line	$35/line
3+ Lines	$50.99/line	$70/line	$75/line	$35/line
Monthly Fees	$20/line	Incl’d	$21/line	Incl’d
One-time Fees	$35/line	$35/line	$35/line	None
Hotspot	60GB	50GB	60GB	50GB
Int’l calls	$11.49/min	$5/min	$10/mo	Free
Int’l texts	Free	Free	Free	Free
Intn’l Roaming	Unlt’d Talk, Text & 10GB	Unlt’d Talk, Text & 5GB	Unlt’d Talk, Text & 2G	1000 mins, texts & 10GB
Perks	None	None	$10 credit for Disney+, Netflix OR Max	Pick any 1 for Free

Basic Unlimited Plans Comparisons

	AT&T	T-MOBILE	VERIZON	US MOBILE
1 Line	$75.99/line	$65/line	$75/line	$17.5/line
3+ Lines	$55.99/line	$50/line	$50/line	$17.5/line
Fast Hotspot	5GB	0GB	0GB	5GB

Non Unlimited Plans Comparisons

	AT&T	T-MOBILE	VERIZON	US MOBILE
Talk & Text	Unlimited	Unlimited	Unlimited	Unlimited
Data	4GB	10GB	0.5GB	2GB
Price	$60/line	$40/line	$50/line	$8/line
Customizable Plans	No	No	No	From $3.5/mo.

Local AT&T, T-Mobile & Verizon stores in Keystone, South Dakota

Frequently Asked Questions (FAQ)