I currently have 5G and nothing better to do so each night I've run a script to download /dev/urandom of a remote machine to /dev/null of my phone while I slept just to waste bandwidth because I can.
@sjw Somewhere, in an office cubicle, an employee of your provider has been tasked to figuring out what you use so much traffic on. When he finally figures it out, you're gonna get one hell of a pissed off email from him.