To simplify - what do these add ons include with the $0 and what is not included?
Best answer by Ahmad
If you're talking about the ones you see on self-serve when you go to add/change add-ons then no. Those are so that your phone will work overseas. It doesn't do anything but allow your phone to work. You will still be charged accordingly if you use your plan while roaming. You would need to purchase an actual add-on in order to save on pay-per-use charges.
If you just go to the US or Mexico, those aren't even required as they're if you're travelling overseas. Your phone will work just fine in the US without it.