Double-hinged and folding, aimed at business use - from 2007!
(All About Windows Phone)

With all the recent renders and patents seemingly predicting a `Surface Mobile` this Spring, with double-hinged design allowing use as a phone or mini-tablet, I thought it appropriate to look back into the past - such a double hinged design was seen before on a business-aimed smartphone, back in 2007, just over a decade ago. And thanks to a kind reader, I`ve got the Nokia E90 in front of my camera again. It`s not much actual use in 2018, but it`s extra food for thought.