Tuesday, March 15, 2011
See "Austrian mobile operators sign mobile data voluntary code" - here.
"The core of this code will see the operators allow customers to view what data they have consumed through a web interface. They have also pledged to inform customers via text when they have reached 70-80 percent of their inclusive data allowance, plus another text when they have used all of this allowance. As an alternative, operators have also agreed to send warning texts to customers when they reach a specific value for mobile data usage"
While this is said to be voluntary, the operators are more or less following the EU "bill shock prevention" regulations (here).