I don't have an unlimited data plan for my phone. I pay for 300 MB. A month. That's it! So before heading off for my morning run, I download the podcast I want to listen to first. Don't forget to turn off Cellular too.
If you lose your phone, and it's nice to know you can hop on the Internet and track its location immediately. To track, play sound, turn on lost mode, or erase, you must have Find My iPhone enabled first. Here's how.