What is att mobile customer service phone number? AT&T Customer Service Phone Number 1-800-288-2747. AT&T is a communications giant that is the largest provider of mobile phone service and home phone service.What is att corporate office phone number? Phone Number: You can call the AT&T headquarters at 1-210-821-4105. This is not the customer service phone number. To reach someone in customer service call 1-800-331-0500 for mobile accounts and 1-800-288-2020 for Uverse products.What is att prepaid cell phone plan? About this Cell Phone Plan. The AT&T PREPAID Unlimited Plan is a prepaid mobile device plan for an inpidual. This AT&T plan offers unlimited calling and text messaging, as well as unlimited texting to Mexico, Canada, and 100 other different countries. The plan also allows unlimited data usage for email, web browsing, video, and more.Can att phones work with tmobile? AT&T is the best option for you as your phone, being a T-Mobile branded phone, is a GSM phone and therefore will only work on T-Mobile or AT&T networks, it will not work on Sprint or Verizon.
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