T-Mobile

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520 N Lone Hill Ave
San Dimas, CA 91773
+1 (909) 206-3864
https://www.t-mobile.com
Located inside Costco Wholesale, Experience the power of T-Mobile's 5G network by switching to T-Mobile. Staffed by experienced T-Mobile employees, we offer exclusive benefits for Costco members. Membership Required.

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Reviews

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3.02 reviews
Priscilla R.
5/1/2025

I had a plethora of problems with my phone had to get a new one, trouble pairing with my watch and hearing aids. Jeena to the rescue, she was so kind and patient and took the time needed to get...

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Photo of Anthony L.
Anthony L.
12/3/2025

The sales person gave me wrong information regarding iPhone 16 and was pushing for iPhone 17 which I regret now because the phone is overheating and feels flimsy poor quality. I even tried to...

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"Joanna was so sweet and helpful. We were previously told it would cost a lot of money to upgrade our phones. After sitting with Joanna and going over our options, it was less the half the amount..."
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United States›California›San Dimas›T-Mobile

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