AT&T Store Diamond Bar Diamond Bar

Day of the WeekHours
Monday11:00 AM - 7:00 PM
Tuesday11:00 AM - 7:00 PM
Wednesday11:00 AM - 7:00 PM
Thursday11:00 AM - 7:00 PM
Friday11:00 AM - 7:00 PM
Saturday11:00 AM - 7:00 PM
Sunday11:00 AM - 6:00 PM
Due to precautions being taken to combat the COVID-19 virus store hours / availability may have been changed and may not be accurate. Please contact the store before visiting to verify location opening and hours of operation.
1257 S Diamond Bar Blvd
Diamond Bar, CA 91765
US
SHOP NOW
4.1 out of 5.0full starfull starfull starfull starempty star
(6 Reviews)
Map of 1257 S Diamond Bar Blvd in Diamond Bar
Get directions to AT&T Store at 1257 S Diamond Bar Blvd Diamond Bar, CA

To continue helping keep our customers, employees, and communities safe, we’ve made a number of changes in our retail stores as a result of the coronavirus pandemic.

• We’re offering Curbside service, touchless transactions and, where available, no-contact delivery with virtual set-up.
• We’re cleaning and sanitizing surfaces regularly, and hand sanitizer is available for employees and customers.
• Masks are required to be worn by employees, customers, and visitors in our stores and will be provided to anyone who needs one.
• Check out COVID-19: Our Response webpage for the latest information.

Samsung Galaxy S21 5G
Best deals for everyone. New and existing customers get the Samsung Galaxy S21 5G for FREE with qualifying trade-in.​ Plus learn how to get up to a $200 Samsung Credit when you pre-order.
America’s best deserve our best
Military, Veterans & their families get our best pricing on unlimited wireless. Learn how to get AT&T Unlimited for less than $27/mo. when you get four lines.
Apple iPhone 12 Pro Max
Learn how new and existing customers get $700 off the new iPhone 12 Pro Max with trade-in.
IT DOESN’T HURT TO CHECK
Find out your eligibility to get a new line on installment or BYOD, it won’t hurt your credit score!
AT&T speed tops the charts! AT&T is Los Angeles's fastest wireless network.
With more people connecting with each other virtually than ever before, having fast wireless speeds is important. Whether you are connecting with family, friends or colleagues or downloading the latest movie, we’ve got you covered.

Special offers and new phones for Diamond Bar

  • Smartphone
    Samsung Galaxy Ultra 5G

    Smartphone

    Learn how to get the new Samsung Galaxy S21 Ultra 5G for up to $800 off with trade-in and get up to a $200 Samsung Credit when you pre-order.
  • Smartphone
    Samsung Galaxy S21+ 5G

    Smartphone

    Learn how to get the Samsung Galaxy S21+ 5G for up to $800 off with trade-in and get up to a $200 Samsung Credit when you pre-order.
  • AT&T Apple Watch BOGO

    Smartwatch

    Learn how you can buy one Apple Watch, and get $200 off a second Apple Watch!
  • iPhone SE

    SMARTPHONE

    Learn how new and existing customers get iPhone SE for $5/mo. Plus save even more with eligible trade-in.
    5.00/mo.Req's 0% APR 30-mo. agmt. For well-qual. customers.
  • AT&T PREPAID
    Prepaid phone plans in Diamond Bar

    Prepaid Phone Plans

    Just open a new line on our $65/mo. plan and sign up for AutoPay & you’ll save $15 each month. Time for a prepaid phone plan in Diamond Bar?
    50.00/mo.
    AT&T may temporarily slow data speeds if the network is busy. First month service charge and taxes are due at sale. One-time activation fee of $15 if activating in a store. Other restrictions may apply. See details
  • AT&T PREPAID iPhone SE (2020)

    SMARTPHONE

    Get the iPhone SE 64GB for $349.99 + $50 toward account. Limited time. Online only. First mo. svc. charge & applicable sales tax due at sale. Excludes upgrades. New customers will receive a $50 account credit after purchase and account activation. Other fees, charges & restr's apply.

About the Diamond Bar Store

Authorized Retailer
Our Services
  • iPhone 12 & iPhone 12 Pro Max
  • Cell Phones
  • Wireless Plans and Setup
  • Phone Activations
  • Trade-In
  • Device Upgrade
  • Device Protection
  • Tablets
  • Wearables
  • TV & Entertainment
  • Internet
  • Bill Pay and Setup
  • Small Business Solutions
Our Services
  • iPhone 12 & iPhone 12 Pro Max
  • Cell Phones
  • Wireless Plans and Setup
  • Phone Activations
  • Trade-In
  • Device Upgrade
  • Device Protection
  • Tablets
  • Wearables
  • TV & Entertainment
  • Internet
  • Bill Pay and Setup
  • Small Business Solutions
Our Location
Looking for the hottest new device or an awesome accessory? Our Diamond Bar Store location has got you covered. We’re your one-stop shop in Diamond Bar, CA. We have phones, tablets, wearables, and more that you’ll love. We also offer in-store activation, so you can get your device up and running in no time. Need a case? How about a charger? Some new headphones? We have all that—and more. And while you’re in the store, make sure to check out our DIRECTV® and AT&T TV NOW packages. They deliver the shows and movies people love talking about. So, now that you know us a little better, stop by our Diamond Bar, CA store located at 1257 S Diamond Bar Blvd! We’d love to get to know you.
Store Events
Black Friday Deals are here! - Fri, November 27

Cellphones, plans & accessories

  • AT&T PREPAID

    Experience the freedom of AT&T PREPAID with plans that allow you to pay for usage in advance without tying you up in a long-term contract. Get unlimited talk & text in the U.S. and the data you need with no annual contract, no credit check, free shipping, and no activation fee for online orders. Shop AT&T prepaid phones for the premium brands you love or bring your own (BYOD) compatible device.
  • POPULAR SMARTPHONES

    When you are ready for a new iPhone or any new phone, AT&T makes it easy. You’ll find everything from the latest feature-rich smartphones to devices for mostly texting and calling. Choose from the most popular brands like Apple, Samsung, LG, and more.
  • ACCESSORIES

    AT&T has the accessories you need to style & protect your devices. Rugged phone cases & sleek phone covers, chargers & batteries to keep you powered up, and speakers, headphones & headsets to keep you connected to your favorite audio, and more. Get free shipping, free returns, and in-store pickup – just order online by 4pm and it’ll be ready within two hours.

What our customers are saying

  • 1 out of 5full starempty starempty starempty starempty star
    I have been AT&T Diamond Bar Store customer for 9 years. In December of 2019, I upgrade my service to $30 per line. However AT&T charged me $40 per line in two bill cycles. On 2/27/2020, I visited AT&T Diamond Bar store to question about the extra Charges. When I was waiting in the store , I noticed the front desk staff was explaining to the other customers in English with patient , polite and respectful manner . When he helped me with my matters, and he explained the reason of my bill overcharged , I was not Signing up for paperless statement, so that AT$T charge me over $10 for each line. He spoke To me in Mandarin. But he was in inpatient, rude, and reproached manners to communicate with me. I asked what was his name, he could not provide to me. When I requested to speak with his manager, he said he was the store manager. I felt the manager discriminated Chinese speakers even though he was native Chinese speaker.
    Response from AT&T
    Hello Qingxiu. Our number one goal is to provide you with an exceptional customer experience. We apologize that this was not the experience you had. Please visit us online at issues.mywirelessgroup.com or send us an email at support@mywirelessgroup.com so we can help further assist you. Your experience in our store matters to us, and we'll work to make sure the next experience is better.
  • 5 out of 5full starfull starfull starfull starfull star
    The data plan on my phone was blocked. The techician in charge at the store spend a good amount of time helping me to unblock the phone. I tried another store previously, but the employee was not so helpful. Also, I asked him about a buffering issue that frequently occurred when I watch live streaming on DirecTV Now. He said he will bring this issue up with the DirecTV Now rep next when he see them
  • 4 out of 5full starfull starfull starfull starempty star
    Everything was fine in the store, was shown the correct phone and all. However was told I was told my phone would arrive to me within 2 - 3 business days. It took 7 days to arrive to me. I needed it asap.
  • 5 out of 5full starfull starfull starfull starfull star
    The sales persons at this shop are really professional. They know how to help their customers.
  • 5 out of 5full starfull starfull starfull starfull star
    Very good customer service. Sales representative was very courteous and polite.

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    Walnut, CA 91789
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