Explore the Simjacker vulnerability, a billion-dollar mobile security threat, in this DefCamp 2019 conference talk. Delve into the intricacies of SIM card technology, applets, and push messages, understanding how a simple piece of plastic can pose significant risks. Learn about the attack's timeline, methods for location tracking and fraud, and the implications of deploying mods. Gain insights into why old technology remains vulnerable and participate in a Q&A session to address concerns about mobile security in the modern era.