We'd love to help with this. If you plan to use data, then, yes, you'll want to keep those on when traveling outside the US while on the AT&T Passport. Here's more information to help you explore the international plan.
Have a great week!
James, AT&T Community Specialist
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Re: With the passport program do I keep my cellular data on and data roaming on?
My advice is keep data roaming off and only turn it on when you want to use data. That will prevent unintended data usage.
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