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.
80
/100
AT&T
92
/100
Verizon
80
/100
5G coverage availability
More availability means having access to 5G speeds more often.
90 %
94 %
AT&T
65 %
Verizon
5G download speed
Higher speed means quicker downloads and smoother video calling.
261
Mbps
AT&T
111
Mbps
Verizon
46
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

Photography By Cynthia
July 29, 2026, 4:20 a.m.
⭐⭐⭐⭐⭐ I had an outstanding experience with the T-Mobile team at Costco in Modesto (Pelandale)! From the moment I walked up, they were attentive, knowledgeable, and genuinely focused on making the entire process easy and stress-free. They took the time to explain every detail of my new T-Mobile plan, answered all of my questions, and helped me set up my new phone from start to finish. I never felt rushed, and their professionalism and patience made switching from my previous carrier incredibly smooth and efficient. The customer service was truly top-notch. It’s rare to find a team that is this friendly, knowledgeable, and committed to making sure everything is set up correctly before you leave. If you’re thinking about switching carriers or upgrading your phone, I highly recommend visiting the T-Mobile kiosk at Costco in Modesto on Pelandale Avenue. They made the switch to T-Mobile simple, seamless, and hassle-free. Thank you for providing such an exceptional customer experience—I couldn’t be happier with my decision! If I could give them more stars ⭐️ I would! 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 - 3801 Pelandale Ave
T-Mobile at Costco - 3801 Pelandale Ave
T-Mobile at Costco - 3801 Pelandale Ave
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 Spreckel's Park Shopping Ctr
9.6 miles away
4.0
T-Mobile Store
T-Mobile Dale Rd - Trader Joe's Center
1.4 miles away
T-Mobile Store
T-Mobile Marketplace on Yosemite Ave
11.5 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