My Smartphone and Me: A Finnish forest engineer This year the number of smartphone users across the globe is expected to top 3 billion, little more than a decade after Apple's gamechanging iPhone first went on sale and transformed the way people interact with their phones. A smartphone is an essential tool for forest engineer Inna Salminen, 27, who carries out inspections of the woodlands in southern Finland on behalf of the National Forest Centre. In the middle of the wilderness, Inna's smartphone is both a navigational aid and safety device, as well as a place to enter all the data she collects during a field visit. IMAGES AND SOUNDBITES