In St. Mary, you’ll select from 3 mobile wireless carriers listed below. 98.2% of St. Mary’s land area is covered by some kind of wireless service, as are 99.15% of St. Mary’s 71 residents. 5G reception covers up to 84.98% of people while they are sitting at home. Note that we may have a financial relationship with some of the St. Mary providers below. This does not influence what data we show, and helps us provide high-quality, detailed information for free.
St. Mary, MT Top Cell Providers
Starter Phones Designed for Child Safety
Coverage:
T-Mobile Network
Data Speeds:
Same as T-Mobile below
Plans start at $29/mo.
View plans
Built-in Parental Controls | Approved Contacts Only | Parent-Controlled Internet Access
Plans include 5G where available.
Coverage:
T-Mobile Network
Data Speeds:
Same as T-Mobile below
Plans start at $15/mo.
View plans
Mint Mobile provides very affordable plans using the same network as T-Mobile throughout the United States. Learn more about Mint vs. other carriers.
T-Mobile 5G available in St. Mary
More about T-Mobile in St. Mary
T-Mobile Data Speeds and Coverage in St. Mary
T-Mobile covers 40.23% of homes in the city with mobile data. The fastest cellular data speed available is 5G. Coverage by homes and land mass (the % of acres with cell coverage versus the total acreage in St. Mary) is shown below.
Tech |
% Homes |
% Land |
|---|---|---|
5G |
32.45% |
33.75% |
4G |
12.22% |
12.79% |
5G is the fastest wireless internet and data speed for 32.45% of homes. 4G is the fastest cell coverage for 0.00% of homes. We rank T-Mobile as #3 out of 3 for a combination of coverage and speed among St. Mary mobile providers.
T-Mobile Voice Quality in St. Mary
5G voice quality can be very clear, and is available to 32.45% of homes. 4G voice is considered HD, and is available at 40.23% of St. Mary homes. 0.00% of homes can make calls using older 2G or 3G voice technology.
AT&T Wireless 5G available in St. Mary
Coverage:
99.15% of St. Mary
96.67% of the USA
Data Speeds:
5G: 84.98% 4G: 93.82% 3G or 2G: 67.39%
1-833-652-2264
More about AT&T Wireless in St. Mary
AT&T Wireless Data Speeds and Coverage in St. Mary
AT&T Wireless covers 99.15% of homes in the city with mobile data. The fastest cellular data speed available is 5G. Coverage by homes and land mass (the % of acres with cell coverage versus the total acreage in St. Mary) is shown below.
Tech |
% Homes |
% Land |
|---|---|---|
5G |
84.98% |
77.94% |
4G |
93.82% |
87.65% |
2G or 3G |
67.39% |
78.12% |
5G is the fastest wireless internet and data speed for 84.98% of homes. 4G is the fastest cell coverage for 0.00% of homes. 0.00% of homes can only receive 2G or 3G data. We rank AT&T Wireless as #1 out of 3 for a combination of coverage and speed among St. Mary mobile providers.
AT&T Wireless Voice Quality in St. Mary
5G voice quality can be very clear, and is available to 84.98% of homes. 4G voice is considered HD, and is available at 99.15% of St. Mary homes. 67.39% of homes can make calls using older 2G or 3G voice technology.
More about Verizon Wireless in St. Mary
Verizon Wireless Data Speeds and Coverage in St. Mary
Verizon Wireless covers 92.75% of homes in the city with mobile data. The fastest cellular data speed available is 4G. Coverage by homes and land mass (the % of acres with cell coverage versus the total acreage in St. Mary) is shown below.
Tech |
% Homes |
% Land |
|---|---|---|
4G |
79.71% |
79.54% |
2G or 3G |
92.75% |
92.39% |
4G is the fastest cell coverage for 79.71% of homes. 0.00% of homes can only receive 2G or 3G data. We rank Verizon Wireless as #2 out of 3 for a combination of coverage and speed among St. Mary mobile providers.
Verizon Wireless Voice Quality in St. Mary
4G voice is considered HD, and is available at 84.51% of St. Mary homes. 81.99% of homes can make calls using older 2G or 3G voice technology.
Coverage percentages on this page are based on the percent of St. Mary homes that would be covered by cellular service of any kind, unless specified as St. Mary land area.
Fastest Cell Service Down to the St. Mary Neighborhood
The map below shows where Verizon, AT&T, or T-Mobile are faster in St. Mary, MT. Areas with no clear winner are shown as ties.
Overall, St. Mary ranks #578 out of 953 cities for the fastest mobile internet network speeds in Montana.

Best St. Mary Cell Provider Key
The southern parts of the city feature better overall coverage for faster data. The opposite is true in the northeastern areas of St. Mary where mobile data speeds are generally slower.
Best Coverage & Data Speeds in St. Mary, MT: AT&T Wireless
Among the largest cell phone companies in the United States, AT&T Wireless has the best speed and coverage in St. Mary. AT&T Wireless has 5G that covers 84.98% of the city. Cell service of any type reaches 99.15% of St. Mary homes.
Cheap Options for Mobile Service in St. Mary, MT
If the price of a St. Mary mobile plan is a major concern for you, cheaper mobile plans are available as well. There are several options available in St. Mary including pre-paid, no-contract plans that start as low as $15 per line. Many of these providers such as Mint, Boost, and Cricket partner with the three major carriers to provide excellent coverage nationwide. With these discount options, the price of your St. Mary wireless plan will quickly rise if you add additional lines or features such as a hotspot or unlimited data.
Plans include 5G where available.
Coverage:
T-Mobile Network
Data Speeds:
Same as T-Mobile above
Plans start at $15/mo.
View plans
Mint Mobile provides very affordable plans using the same network as T-Mobile throughout the United States.
These providers all offer excellent coverage at a lower price compared to more well-known brands. Mint is generally regarded as the most affordable provider for unlimited data, with a high "throttle cap" of 35GB. Depending on where you live, you may prefer the AT&T network coverage offered by Cricket. Boost is a good option for international travelers.
St. Mary, MT Mobile Network Coverage Maps | Voice, 4G & 5G

St. Mary Fastest Speeds Key
Your mobile coverage in St. Mary may vary based on your provider and location. The map above shows the fastest mobile data speeds in and around the city. To see coverage for an individual provider, click the provider's availability maps above.
There are several types of mobile coverage to consider when evaluating a carrier’s geographic reliability. 5G is the fastest mobile data connection in St. Mary covering 84.98% of homes in the area while 4G covers 99.15% of the city. Overall, 99.15% of homes (71 people) and 98.2% of the land (215.3 square miles) are covered by some form of cell technology.
5G Coverage Map and Availability in St. Mary

St. Mary 5G Coverage Key
5G is currently the most advanced network available with speeds several times faster than 4G. 5G networks in St. Mary cover 84.98% of homes with 5G voice and data. In total 79.14% or 173.4 square miles of St. Mary are covered by 5G. The best 5G coverage in St. Mary comes from AT&T Wireless with 84.98% coverage.
4G Coverage Map and Availability in St. Mary

St. Mary 4G Coverage Key
4G/LTE networks have become one of the nation’s most common mobile coverage types for data, and in some locations, voice calls. In St. Mary, 93.82% of the area is covered by 4G data, and 99.15% is covered by 4G HD voice service. AT&T Wireless has the best 4G network in St. Mary with 99.15% coverage.
Selecting the Best Cell Provider in St. Mary for You
If you’re still struggling to choose a cell phone provider in the city, some of these facts may help you decide:
- Coverage to St. Mary houses is best with service from AT&T Wireless, with 99.15% of homes covered.
- The best coverage across all St. Mary land is provided by AT&T Wireless at 97.48% of land area covered.
- The current best 5G coverage comes from AT&T Wireless reporting 84.98% in St. Mary.
- The best 4G coverage is obtainable with AT&T Wireless, covering 99.15% of St. Mary.
- The top estimated average speed in St. Mary, estimated at 60.34, Mbps is available through AT&T Wireless.
Mobile Service Cities Near St. Mary
If you live near St. Mary but aren’t technically in the city, or you like to explore the region a lot, your coverage availability and speeds may vary.
Enter your zip code here to find more precise mobile numbers on your exact location. Here are our mobile and cell phone guides for several popular locations in and around St. Mary:
Cities close to St. Mary
- Starr School, MT: better coverage
- Swiftcurrent, MT: worse coverage
- Babb, MT: worse coverage
- Browning, MT: better coverage
- East Glacier Park, MT: worse coverage
- Del Bonita, MT: worse coverage
- Heart Butte, MT: worse coverage
- Summit, MT: worse coverage
- Essex, MT: worse coverage
- Cut Bank, MT: better coverage
Cities with similar populations to St. Mary
- Seitz, KY: worse coverage
- Minerva, OR: worse coverage
- Mynot, AL: worse coverage
- Sayre, AR: better coverage
- Schaal, AR: worse coverage
- Schluersburg, MO: worse coverage
- Scholls, OR: better coverage
- Schuchk, AZ: better coverage
- Scotch Bonnet, NJ: better coverage
- Scotland Beach, MD: worse coverage







