I've been paying $97 all along. Got my 3GS on 6/21/09.
My date was 11/21 but read about the $100 trick 2 weeks ago. I updated my plan to be more than $100. My payment was due last week. So my bill was for $150 with the updated plan in effect. Paid it, day later, now my date changed to 6/21.
Needless to say, once I get my new iPhone, my plan is changing again: Back to $97. Take that AT&T.
My date was 11/21 but read about the $100 trick 2 weeks ago. I updated my plan to be more than $100. My payment was due last week. So my bill was for $150 with the updated plan in effect. Paid it, day later, now my date changed to 6/21.
Needless to say, once I get my new iPhone, my plan is changing again: Back to $97. Take that AT&T.