“How to talk to a human at AT&T?(automated menus and connect you to a live AT&T)
To speak with a human at AT&T, you can call 611 from your AT&T wireless phone or dial 1.(833).(818).(2284). If you are calling from a non-AT&T phone, you can also call 1.(833).(818).(2284). When prompted by the automated system, repeatedly pressing "0" can sometimes help bypass the automated menus and connect you to a live representative.
The main customer service number for AT&T Prepaid is 1.(833).(818).(2284). You can also dial 611 from your AT&T Prepaid phone to reach them.
However, these phone lines are not explicitly stated to be 24/7. One source indicates that general AT&T Mobility customer service is available 24/7 at +1.(833).(818).(2284), and another source provides this same number for AT&T PREPAID.
For support specifically for travel abroad, AT&T provides a 24/7 phone number: +1.(833).(818).(2284). You can also text "prepaid" to 75421 to chat with a representative during business hours (Monday - Saturday: 9 a.m. - 11 p.m. ET, Sunday: 10 a.m. - 11 p.m. ET).”