We were traveling Phoenix to the North Rim GC, with "Data Roaming" turned off, with AT&T. They have poor/non-existant service from about 15 miles north of Flagstaff (phone and data).
When we got back, we got a text message from AT&T warning us about data roaming and needing to watch the top of the screen every time we used the phone to see if we were roaming, otherwise they would restrict us somehow.
Since we had no phone service and Data Roaming turned off, it never dawned on us that we could be "roaming". I can understand there are charges for international roaming, and there could be charges for domestic roaming, but with Data Roaming "OFF", you'd think you'd never encounter this problem.
After spending about 15 minutes talking to them, and reading the above, it looks like Roaming could happen (against our wishes and against the iPhone setting) if someone sends us a text/SMS message of any kind, and they only way they can suggest to avoid the problem is to go into Airplane Mode (and this is a ridiculous "solution" when you are traveling in much of the Western US).
Anyone have any suggestions as to how to deal with this issue?
Thanks!