A bug in Apple's AV Foundation framework, which handles streaming audio and other media for podcast apps, radio apps, and more, could be behind the mysterious, maddening cellular data spikes many users, myself included, have experienced since updating to iOS 6 or the iPhone 5. In essence, iOS just keeps on downloading data, over and over and over and over again, sometimes gigabytes worth at a time.
Good news, iOS 6.0.1 has been released! It promises fixes for a bunch of annoying bugs, but if you're brand new to the iPhone, iPod touch, or iPad, you might be wandering how you can get it? iOS will popup an alert to tell you iOS 6.0.1 is available, but if you miss it, or you simply don't want to wait, you can start the update process manually as well.