T-Mobile Store

T-Mobile Harbor Blvd & Baker St

Open now
Thurs: 10:00 am - 8:00 pm
4.1/5
T-Mobile Home Internet
T-Mobile Prepaid
T-Mobile For Business
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T-Mobile Network Performance

Data provided by Umlaut
 From January-2026 to June-2026
5G network score
The higher your score, the more likely you can connect to a faster, more stable network.
90
/100
AT&T
87
/100
Verizon
83
/100
5G coverage availability
More availability means having access to 5G speeds more often.
88 %
91 %
AT&T
80 %
Verizon
5G download speed
Higher speed means quicker downloads and smoother video calling.
281
Mbps
AT&T
327
Mbps
Verizon
89
Mbps
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Featured Promotions at T-Mobile Harbor Blvd & Baker St

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Via Virtual Prepaid Mastercard ® when you sign up online and activate a qualifying new Home Internet line. Not available in retail. Allow 14 weeks from rebate submission.

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

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T-Mobile Harbor Blvd & Baker St
3030 Harbor Blvd
(714) 437-7460

Costa Mesa’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 Harbor Blvd & Baker St, 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 (714) 437-7460 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

Featured reviews at T-Mobile Harbor Blvd & Baker St

Corinne Pastor
Oct. 31, 2026, 10:56 p.m.
I went into the Harbor & Baker Costa Mesa store. I signed up initially though online but was given no direction from the online (might want to work on the online sign up services) service. I called t-mobile services and was instructed to go into a store for assistance. Walked in that store was immediately greeted. Christian O was the one that helped me. My goodness I could not do his job he was really patient (he had to call to get a temporary code), explained everything and was extremely helpful. View on Google
Matt Martinez
Oct. 29, 2026, 5:04 p.m.
Exceptional employees, but a disappointing experience with T-Mobile's policies and processes After decades with AT&T (since the Cingular Wireless days), I switched my family's four lines to T-Mobile for its promotional offers. Unfortunately, while the customer service has been exceptional, the financing and ordering experience has been extremely disappointing. Despite an excellent credit score of 805, I was approved for only $2,000 in equipment financing, partly because I had no T-Mobile history. I learned this only AFTER transferring our numbers. Consequently, I had to pay nearly $2,000 upfront for three phones advertised as being "on us," with promotional credits spread over 36 months. These potential costs should be disclosed before customers commit to switching. Things got worse when I preordered the iPhone Duo through Apple. I qualified for a $1,000 trade-in promotion, signed T-Mobile's financing agreement, and received confirmation for October 23 delivery. October 23 came with no phone or explanation. On October 25, delivery was pushed to October 28. Then, on October 28, my order was suddenly CANCELED without warning. I discovered that T-Mobile's system had automatically canceled the order because I had only $55 in remaining equipment financing availability. Despite having a confirmed order and signed agreement for nearly two weeks, nobody contacted me or gave me an opportunity to resolve the issue. I would have gladly discussed an additional down payment. Now the phone is backordered until January, and I'm expected to start over. Here's where T-Mobile deserves genuine praise: its employees. Branden and store manager Gabby at the Costa Mesa location near Harbor and Baker were absolutely outstanding. They patiently listened, investigated the cancellation, contacted T-Mobile support, requested financing exceptions, and called other stores searching for an available device. They were empathetic, sincerely apologetic, and genuinely committed to helping. Although company policies prevented a resolution, they went above and beyond. I never felt dismissed or rushed. Crystal at the Eastvale Costco T-Mobile kiosk was equally helpful during my initial transition, advocating for an increase to my financing limit. Unfortunately, all three were told no exceptions could be made until a reevaluation after six months. Every T-Mobile employee I've encountered has been wonderful. Their customer service actually exceeds what I experienced with AT&T. But exceptional employees shouldn't have to compensate for confusing financing policies, poor communication, and canceled orders. My advice: Before switching, ask about equipment financing limits, upfront costs, and promotional credits. Even excellent credit and a confirmed order may not prevent unexpected problems. Branden, Gabby, and Crystal deserve recognition. T-Mobile's employees have earned my respect, but the company still needs to earn my confidence. View on Google
Jesus Tetatzin
Oct. 14, 2026, 1:10 a.m.
Brandon help me out with an error made on my bill made everything super. Easy, i'm very happy with the service View on Google

Locations near T-Mobile Harbor Blvd & Baker St

T-Mobile Experience Store
T-Mobile E 17th & Irvine
3.6 miles away
4.2
T-Mobile Experience Store
T-Mobile Knott & Katella
9.9 miles away
4.2
T-Mobile Experience Store
T-Mobile State College & Lincoln
11.1 miles away
3.8

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 Harbor Blvd & Baker St 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 Harbor Blvd & Baker St 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