Originally Posted by Rican2008
Will AT&T know you are tethering? I am on unlimited plan and they may just switch me to a limited plan. That will suck!
They can't switch your plans unless you say so. They either need your sig from a store or need you to switch online. The worst that might (and most likely won't) happen is that they'll just cancel your plan, in which case, congrats, you just got an Atrix for a really good deal.
What is most likely gonna happen is that IF AT&T figures out you are tethering, they're just gonna charge you for it. I don't know how AT&T's rates are, but I believe the company I'm with, Bell (it's in Canada) charges about $5/mb if you're tethering.
So, if I were you, I'd get the app or do the mod. Then use about 1mb through tethering. Then call them in a few hours, maybe the next day and ask how much tethering you have used so far. If they say 1mb, you did something wrong (and get dinged on your next bill for it), if they say nothing, then you're good.