Featured promotions at T-Mobile at Costco

T-Mobile Network Performance

Data provided by Umlaut From July-2025 to December-2025   See coverage map
5G network score
The higher your score, the more likely you can connect to a faster, more stable network.
77
/100
Verizon
80
/100
AT&T
76
/100
5G coverage availability
More availability means having access to 5G speeds more often.
88 %
89 %
AT&T
88 %
Verizon
5G download speed
Higher speed means quicker downloads and smoother video calling.
280
Mbps
AT&T
142
Mbps
Verizon
130
Mbps
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T-MOBILE TRIAL

Try T-Mobile FREE
for 30 days.

Test-drive our award-winning network and some of our favorite benefits for 30 days—no commitment or credit card required. We won’t even tell your other carrier.

Get started now
Qualifying non-T-Mobile network user & compatible, unlocked device required. 1 trial user. See 5G device, coverage, & trial details at T-Mobile.com.

Featured reviews at T-Mobile at Costco

Donald Watson
May 8, 2026, 8:02 p.m.
Tristan answered questions and explained things well! View on Google
Keelan Chen
May 7, 2026, 9:53 p.m.
Tristan went above and beyond! He was very friendly and helped answer all our questions. Will definitely be back! View on Google
Vanessa Rutledge
May 6, 2026, 2:18 a.m.
Tristan at the kiosk in Costco was extremely helpful. Even when I felt a little flustered with how difficult my other carrier was to switch from, he found a way to make me feel heard and confident that Tmobile would be able to make it an easier transition for me. He was very informative and kind. Made sure I knew if I had any further questions that he would be there to help. He was true to his word. My issue was resolved in the exact amount of time he had estimated. View on Google
Lisa Ewert (MP girl)
May 6, 2026, 12:57 a.m.
We were looking to switch from Verizon. A friend told us about Tristan at this Boise location. We drove from Caldwell and it was totally worth it! Tristan was so helpful, knowledgeable and got us up and running with T-Mobile very quickly. Best experience with a phone carrier ever! A++ View on Google
Paula
May 6, 2026, midnight
If I could give 10 stars I would! Tristan is the BEST! He is a genuinely super nice human and goes above and beyond to help you. He saved us a ton of money switching from Verizon and took a ton of time figuring out what phones and plans would be best. He made the whole experience fun and easy. I highly recommend seeing Tristan at T-mobile. He is a stand out guy, genuine, salt of the earth. Best experience buying new phones ever. View on Google

Additional information about T-Mobile at Costco

IDs Accepted
  • US State issued drivers license
  • US Passport or Permanent Resident Card (Green Card)
  • State ID
  • International student visa with passport (Visa types: M, J, F)
  • Matricula Consular card (Mexico and most Latin American countries, check with your store mobile expert)
  • Employment Authorization Document (EAD)
  • US Military ID
T-Mobile at Costco - 2051 S Cole Rd
T-Mobile at Costco - 2051 S Cole Rd
The leader in 5G – Now America’s largest 5G network is also America’s fastest and most reliable 5G network. Shop T-Mobile at this location. Please contact this location for full service options.
  • Activate Wireless Service
  • Activate Home Internet Services
  • Upgrade or Trade-In Your Phone
  • Exclusive Member Benefits

Locations near T-Mobile at Costco

T-Mobile Experience Store
T-Mobile Eagle Rd & N Cajun Ct
5.0 miles away
5.0
T-Mobile Authorized Retailer
T-Mobile Overland Rd & Cole Rd
0.5 miles away
4.2
T-Mobile Authorized Retailer
T-Mobile Boise Towne Square
1.5 miles away

Got Questions about T-Mobile Stores?

Yes. Check out our special offers for new phones and great deals on our mobile phone plans.

We offer the latest iPhones. Check our store inventory and either buy in-store or online today.

Yes. Trade in your phone at a T-Mobile store and receive instant appraisal and credit. See our trade-in guide for details.

Yes, visit our T-Mobile store at T-Mobile at Costco for assistance with setting up your device.

Browse devices and plans online, contact us for assistance, or visit this T-Mobile location at T-Mobile at Costco for personalized help.

Yes. Some plans include subscriptions to services like Netflix or Apple TV+. Check our plans for available perks and add-ons.

Use our Store Locator to find the nearest T-Mobile store.

T-Mobile stores offer a wide range of accessories compatible with your device, including cases, chargers, and headphones.

No, you can pay your bill online through our website or the T-Mobile app.

Only compatible devices can use T-Mobile's 5G network. All new phones are 5G ready.

The T-Life app provides a simplified experience for customers by offering everything in one convenient location. In the T-Life app, T-Mobile and Metro by T-Mobile customers can access the same great perks and exclusive deals you know and love from T-Mobile Tuesdays, VIP benefits, and more! Plus, you can easily manage most aspects of your T-Mobile account directly from the T-Life app, with new features being added regularly.
Yes, the T-Life app can be found in your Google Play Store or Apple iOS App Store