I never used all my cellular data on xfinity its 20 gigs. I have even had to use the hotspot on my work computer when the internet was down for several days. podcasts mostly download on wifi but sometimes one comes in while I am listening while riding and I download and listen to it. but last month I got a warning I was close then went over in maybe 10 days. I didn't to know what was going on as the cellular plan data does not reset automatically. so when the 15th came around I reset it and today I got a notice. I checked and podcasts have used 12.9 gigs of data in 5 days. I only have maybe 15 podcasts and they are all audio. I had to turn off using cellular data for downloads for the month then I will have it ask for podcasts over 200 megs and see what's so large. but it doesn't make sense as it has never been an issue before.