Phones typically contain as many as 60 elements, including rare metals such as iridium, which is used in touch screen technology. Mined mainly in China, iridium has been in short supply ...
Iridium ore is primarily mined from Iridium nodes in the Skull Caverns, Quarry and Volcano Dungeon. It can also be mined from Mystic Stones, in the mines (level 100+).