I have been billed several hundred dollars each the past two monts for listening to podcasts while I walked my dog. I thought "download" meant "download" to my iphone when I am at home using wireless. I denied one request to use cellular, while walking, but never saw another. Apparently, I've been calling people and staying on the phone for 45 minutes every morning. I cannot believe this! This month I could have bought a Galaxy.
Now I find an "add to on the go" choice if you dive deeper into the info section of a particular podcast. Otherwise, "downloading" on your wireless network, is just permission to gouge the **** out of you when you take a walk and listen to those "downloaded" podcasts delivered over cellular exchange. I can even see the circular icon pretending to be installing or "downloading" the podcast when I click on the cloud/arrow downward icon. And the list of "my podcasts" shows you have 3 of this podcast and 5 of that podcast, with no warning whatsoever that these don't exist on your phone!
If you disable all cellular you can't get essential things like weather radar. If I could login (which I can't, another story) I will know if this works. I don't know if selecting Podcasts individually to disable Podcasts using cellular works, some say it doesn't, but drilling down and using "add to on the go" for each podcast you want might be the safest. What a ripoff!
I am going to protest my bill and will keep this forum informed.