@RustyCrab @david Schools tend to be dead zones (whether it's intentional or not or how they do it, I don't know), so you are stuck using their Wi-Fi if you want to access the Internet.

All it takes is one tech savvy kid to teach other kids how to do it, and that knowledge spreads like a virus. I remember being in high school ten years ago, and even then, jailbreaking iPhones was common knowledge.