So how does this CO2 emission breakdown over the lifetime of the phone? Well 74% of the emissions occur before you even get your hands on the phone (54% in production, 4% in Nokia operations in the factory, and 16% in transport), 25% during your ownership of the device, and 1% during the recycling and recovery of the device.
Image credit: Nokia
But, in terms of environmental impact, it's not so much about the CO2 emissions that come from running a phone, but rather the CO2 emissions that come from making a phone.
Of course, you might also want to consider the savings in CO2 emissions that comes from using a smartphone. The chances are, thanks to convergence, a typical smartphone will eliminate one or more other gadget from your life, or the need-to-buy list. Using the phone can save on CO2 emissions too. For example, drivers using a satnav solution, like Nokia Drive, are estimated to use 5%-10% less fuel (not getting lost, route optimisation, and regulating speed) and the communications and collaboration abilities of a phone should cut down on the amount of journeys you need to take.