French company GiFi sold in 2024 and early 2025 a cheap smartwatch under its Homday Xpert brand, and we resisted as much as we could but in the end bought some of them to see what it was made of. In this talk, we will explore this smartwatch’s internals, from tear-down to firmware extraction (using a weird technique exploiting a remote vulnerability combined with some electronics), to the analysis of the gathered files. We’ll also dive into Chinese vendor JieLi system-on-chips and its related ecosystem, and reveal the truth no one really expected about this smartwatch (really, nobody ain’t see this coming ?).