My answers are not hostile. They are straight forward. I don't sugar coat stuff. also, dumbphones != smartphones (where the more revenue is and where more incentive there is to catch you)
Then there's no need to speculate on whether or not my line of thinking makes me sleep better at night
. Anyway, I'm not a total moron, and I'm not closed minded either. I offer my experience, and drew a conclusion based on that experience. However if there's a compelling enough reason to change my mind, I will. IMO, AT&T being one of the oldest companies isn't a really evidence pointing towards their ability or inability to identify phones. Maybe they can, maybe they can't, I just want to see some evidence (even if anecdotal).
Just an example I send my cousin a JB and unlocked iphone 4 in Greece and she's been using it on Vodafone before it even is available to go on sale in that country.
When she called them for help on setting up the correct settings for carrier data and MMS they knew right away what phone she was using and were pretty excited to help she said.
You see, my dad used his iPhone 3GS in India last year, and as far as I know, they didn't know which phone he was using (they have some plans that are meant for iPhones, and he wasn't forced onto one). I'll concede, I don't really feel like arguing the point. Either way, AT&T should be able to tell if 3G data is being used on an edge-only plan, so the OPs plan isn't a very good one imo.