plans eligible for international day pass

The Mobile Share value plans and mobile share Advantage Plans as well as the current 4 gig plans are eligible.  If you are able to log into your account and add international day pass to your line, then your plan and line is eligible. 

https://www.att.com/international/day-pass/

Please add it yourself so you know it's correct! 

Please be aware that International day pass allows you to use your domestic plan as if you were still in the United States. That means if you have limited amount of data that you will be charged for overage, or data will stop working, if you don't control your phone's data use. 

Thanks, FKA!  This helps, but ... I currently have a mobile share plan, which does appear to permit me to sign up for IDP (international day pass), but I'm considering switching to the 4GB plan, and would like to see some kind of official documentation that it's eligible before making that decision :)

Yes, the 4 gig plan is IDP eligible (no passport!) 

https://www.att.com/support/article/wireless/KM1175103/

That plan does charge overage on data. 

You really should compare that plan to unlimited starter. Especially if you have more than three lines. Unlimited starter is cheaper.  

Excellent, thanks!