SOUTH DAKOTA · STATEWIDE · FCC DATA

Best cell phone coverage in South Dakota South Dakota, statewide · AT&T · T-Mobile · Verizon

Verizon reports the widest coverage in South Dakota: 89.8% of the area outdoors, 18 points ahead of T-Mobile. AT&T is close enough behind that the top two are effectively level.

Figures are the share of South Dakota's area where each carrier reports 4G LTE or 5G service to the FCC, as of December 31, 2025. A state or city figure can hide dead spots, so check your own ZIP code below.

RESULT · SOUTH DAKOTA

Coverage in South Dakota

FCC filings as of December 31, 2025

★ WIDEST REPORTED COVERAGE
Verizon
89.8%

Verizon reports 4G LTE or 5G across 89.8% of South Dakota outdoors and 45.7% in a moving car. AT&T is close enough behind that the top two are effectively level.

Outdoor
89.8%
In car
45.7%

AT&T vs T-Mobile vs Verizon in South Dakota

#1
Verizon
Reported coverage, % of area
Outdoor
89.8%
In car
45.7%
#2
AT&T
Reported coverage, % of area
Outdoor
89.6%
In car
63.6%
#3
T-Mobile
Reported coverage, % of area
Outdoor
71.8%
In car
26.1%

Outdoor is the share of the area where the carrier reports 4G LTE or 5G to a phone standing still outdoors; in car is the share it reports to a phone in a moving vehicle, which is always lower. Indoor signal is not part of the FCC filing and can be weaker than either.

4G and 5G across all carriers in South Dakota

4G LTE
95.7%
5G 7/1
77.3%
5G 35/3
62.9%

Share of South Dakota's area where at least one carrier reports each technology outdoors. "5G 7/1" means 5G of at least 7 Mbps down and 1 Mbps up, "5G 35/3" at least 35/3 Mbps, the two speed tiers the FCC publishes. The FCC summary does not split 5G by carrier.

Checking Verizon for your address

Verizon's filing covers the most of South Dakota. A cheaper plan on a carrier that doesn't reach your street costs more than it saves, so start from coverage and pick the plan second. Every carrier's own map lets you check a street address.

Verizon coverage map → AT&T coverage map → T-Mobile coverage map →

Coverage in South Dakota's largest cities

Other states