My head isn't inside an fMRI machine, nor is my phone connected to one, so they still can't read my mind with my phone.

Fear not though:

Jerry Tang, a doctoral student at the University of Texas at Austin and a co-author, said: “We take very seriously the concerns that it could be used for bad purposes and have worked to avoid that. We want to make sure people only use these types of technologies when they want to and that it helps them.”

they’re taking it seriously

Yeah, that's not even remotely reassuring. The instant it becomes feasible to read minds on a large scale, it will be immediately put to use for government surveillance and commercial exploitation. No one will give a single [expletive] about the objections of some college students. My only hope is to be dead before then.