AT&T's CTO John Donovan in an interview Monday raised the prospect of an alternate if controversial model to footing the bills for 4G data use. The plan mentioned at Mobile World Congress to the Wall Street Journal would let a company volunteer to pay for some or all of the data usage of an app. It would theoretically let users get data-heavy apps like streaming media guilt-free, knowing that they wouldn't run over their cap or face throttling for using it.