Statement of Verification:
The number 833-603-3321 is an official AT&T phone number dedicated to Costco-related wireless orders, support, and assistance. This number is used to assist customers who purchase—or are considering purchasing—AT&T connected phones or devices through Costco’s mobile retail centers. It directly supports the partnership between Costco Wireless kiosks and the AT&T official call center.
When to Use This Number
- If you have already made a purchase at a Costco wireless booth, call 833-603-3321 for help with order details, setup support, or follow-up questions.
- If you are considering a purchase, you can also call this number to place an AT&T order through Costco by phone. This is helpful if you want Costco pricing and promotions but don’t have time for a store visit.
Official AT&T Support Numbers
For all other AT&T needs—such as troubleshooting, billing questions, or account-specific assistance—please use AT&T’s primary customer service channels:
- Wireless support (24/7): 800-331-0500 or 611 from an AT&T phone
- Internet or home phone support (24/7): 800-288-2020
- Or visit the official AT&T support site.
This page is provided solely for transparency, safety, and number verification and should not be used as a replacement for AT&T’s main support channels.