Explore a Black Hat conference talk that uncovers alarming privacy breaches in Android devices. Delve into research revealing how certain Android models contain firmware that covertly collects and transmits users' sensitive personal data to servers in China without consent or disclosure. Learn about the ADUPS firmware, its track record, and the various types of data exfiltrated, including text messages, browsing history, and application logs. Understand the internal mechanisms used for data collection and transmission, and gain insights into the broader implications of these privacy violations in the mobile device ecosystem.