A new open-access tool called Mine My Phone connects global mining locations with the ten key metals found inside smartphones. These metals—such as cobalt, lithium, and rare earth elements—are essential for making modern phones function. The tool was developed by Back Market in collaboration with nine international experts to increase awareness about where these materials come from and the impacts of their extraction. It aims to help users understand the hidden environmental, social, and geopolitical costs of the devices they use daily. Smartphones are made from more than 70 raw materials and over 50 metals, many of which are mined from the Earth. For example, a typical 200-gram phone requires extracting resources from over 200 kilograms of raw material—roughly the weight of 200 bags of sugar, 100 bricks, or a single adult grizzly bear. Mining these materials can destroy landscapes, pollute water sources, and disrupt ecosystems. In countries like the Democratic Republic of Congo (DRC), Argentina, and the Philippines, mining operations have displaced communities and, in some cases, relied on child labor, which remains a hidden issue for many consumers. The demand for these metals has also led to geopolitical tensions and fragile supply chains. Some of these materials, like cobalt and rare earth elements, are found only in a few places in the world, making access to them a point of competition. Rare earth elements, which include metals like neodymium and cerium, are found in low concentrations in the Earth’s crust, making them difficult and expensive to extract. Despite their importance, most people are unaware of what goes into their phones. Surveys show that over half of those surveyed could not name a single raw material in their device, and many have never considered where their phone’s materials come from. Mine My Phone allows users to trace the origins of their phone’s materials and explore the environmental, human, and geopolitical impacts of their extraction. The tool also includes interviews with experts and reports on mining conditions worldwide. It highlights the need for more sustainable practices in the smartphone industry, such as designing phones that are upgradable, repairable, reusable, and recyclable. While some companies, like the Dutch firm Fairphone, are already working on modular, repair-friendly designs, larger industry players have yet to fully embrace these changes. As demand for metals like cobalt is expected to outpace supply by 2040, the need for responsible sourcing and sustainable technology design has never been more urgent.