Fairphone was the first brand to register for an official account on Open Sourcemap - and they did it to publish the supply chain of the next-generation ethically sourced Fairphone 2. It's no easy feat considering they were able to trace the phone down to the raw materials' country of origins and the mines themselves in some cases. See the embedded map below or visit it directly on the Fairphone website. 

Mapping the Journey of your Phone on Fairphone.org