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Featured promotions at T-Mobile 124th & Capitol

Featured categories at T-Mobile 124th & Capitol

T-Mobile Network Performance

Data provided by Umlaut From April-2025 to September-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
AT&T
84
/100
Verizon
78
/100
5G coverage availability
More availability means having access to 5G speeds more often.
89 %
92 %
AT&T
51 %
Verizon
5G download speed
Higher speed means quicker downloads and smoother video calling.
100
Mbps
AT&T
85
Mbps
Verizon
59
Mbps
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T-MOBILE TRIAL

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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.

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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 124th & Capitol

Elijah Hoeltke
Jan. 16, 2026, 7:42 p.m.
Super helpful employees made upgrading and transferring a line super easy. Very clean store, super well kept. Was in and put with no extra steps. Very much recommended this store. View on Google
Narrator Berth
Jan. 6, 2026, 5:51 p.m.
The assistance at this location was truly outstanding. Nisha, Joanna, and Paul went above and beyond to help my mother smoothly transfer her services from another provider. Their patience, kindness, and attention to detail made a potentially stressful process easy and reassuring, and my mother was extremely grateful for the care they took to ensure she received the best possible phone service and home internet options. Management should be incredibly proud to have a team that delivers this level of exceptional customer service. I would enthusiastically recommend this location to anyone looking for reliable service and genuinely helpful staff. ......blessings View on Google
Rita Vogel
Dec. 29, 2025, 1:35 p.m.
Shoutout to Harold at T-Mobile!My daughter and I came in to upgrade our phones, and Harold made the entire process seamless and actually enjoyable. He patiently explained all our options, answered every question we had (and we had a lot!), and found the perfect plan for our family's needs. He has a fantastic personality knowledgeable, friendly, and genuine. He treated us with so much care and made my daughter feel involved in the decision. This was by far the best customer service experience we’ve ever had at a cell phone store. Thank you, Harold! View on Google
Erica Vogel
Dec. 29, 2025, 1:33 p.m.
Harold was awesome!!! He definitely knows his business and went above and beyond for my mother and I. 10/10!! Thank you so much!!! View on Google
Amanda McWalter
Dec. 27, 2025, 9:48 p.m.
Andrew made my son’s phone upgrade super easy today! Thanks for the great service View on Google

Additional information about T-Mobile 124th & Capitol

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 124th & Capitol - 3860 N 124th St
T-Mobile 124th & Capitol - 3860 N 124th St

T-Mobile 124th & Capitol
3860 N 124th St
(414) 462-3899

Wauwatosa’s 5G leader — with membership perks and coverage that go beyond wireless. T-Mobile powers America’s largest, fastest, and now most advanced 5G network — backed by satellite coverage that keeps you connected even off the grid. At T-Mobile 124th & Capitol, explore the latest devices from Apple, Samsung, and Google, with great deals and flexible ways to pay. Whether you’re upgrading, switching, or just looking, our experts are here to help.

Call us at (414) 462-3899 or stop by today.

What You’ll Find In-Store:

  • Activate Wireless or Prepaid Service
  • Activate Home Internet Services
  • Purchase Phones, Tablets, and Accessories in Store
  • Upgrade or Trade-In Your Phone
  • Small Business Plans And Services
  • Connected Products for Home, Family, and Automobile
  • Buy Online, Pick-Up In Store

Locations near T-Mobile 124th & Capitol

T-Mobile Store
T-Mobile W Bluemound Rd & Main St
4.3 miles away
T-Mobile Store
T-Mobile at Sam's Club
5.4 miles away
T-Mobile Store
T-Mobile at Sam's Club
7.0 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 124th & Capitol 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 124th & Capitol 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