1=> Yes
2=> 8525 & i607 (when I need to tether)
3=> Yes
4=> AT&T
5=>Affordable, but I don't follow the TOS
6=>The phones I'll change depending on what I need. Service is pretty good most places I go, 3g is now in most areas I visit. The plan I have (currently the iphone plan) offers unlimited data, but not tethering. I have always had heavy data usage on my account no matter what the phone and plan have been so I'm not overly concerned with AT&T coming after me.