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.
90
/100
Verizon
82
/100
AT&T
77
/100
5G coverage availability
More availability means having access to 5G speeds more often.
91 %
89 %
AT&T
85 %
Verizon
5G download speed
Higher speed means quicker downloads and smoother video calling.
263
Mbps
AT&T
113
Mbps
Verizon
58
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

Brizeida Contrera
June 25, 2026, 2:37 a.m.
good experience the team was amazing answered all my questions definitely recommend and would go again View on Google
Angel Cuevas
June 24, 2026, 3:43 a.m.
Nicole has excellent customer service she is very patient and helpful View on Google
Alex Saavedra
June 24, 2026, 2:14 a.m.
I had the best experience at this place View on Google
Elijaih
June 23, 2026, 11:28 p.m.
I had a great experience working with Nicole at T-Mobile. She was friendly, professional, and takes the time to help you find the best plan for your needs. She answers all of your questions clearly and makes the entire process simple and stress-free. Nicole goes above and beyond to make sure your satisfied, and her excellent customer service truly stands out. I highly recommend her to anyone looking for help at T-Mobile or looking to join. View on Google
Jr Ortiz
June 23, 2026, 10:58 p.m.
Huge shoutout to Nicole at T-Mobile for the excellent service. She was friendly, efficient, and super helpful with my questions. She made what could have been a complicated issue very easy to resolve. Highly recommend asking for her if you’re in the store! 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 - 3125 Queensgate Dr
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 Store
T-Mobile George Washington Way & Mcmurray St
3.4 miles away
4.3
UScellular + T-Mobile Store
UScellular & T-Mobile N Columbia Center Blvd & W Quinault Ave
5.3 miles away
T-Mobile Store
T-Mobile Columbia Ctr Blvd & Grandridge
5.4 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