Why every design should start with the problem

A number of years ago I owned a Windows phone, like the one shown below. At first I loved my Windows phone, I really did. It felt great to hold in the hand (much better than a slippery iPhone). It had a great screen and battery life. It had a very intuitive interface and what’s more I paid significantly less than I would have done for an iPhone. Alas, like I suspect many Windows phone users I soon fell out of…