We can definitely assist you with signing in to your myAT&T account. When you visit our website to Sign in and manage your account online, you will need to enter your User ID and password. Is this message displaying after you entered your login information? Did you get a chance to Create your User ID already? If not, you can follow the steps at the link provided to get started. Also, please use the following link to recover your login information if you Forgot your User ID/Password. Let us know if this helps.
Sean, AT&T Community Specialist
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