A niché market gap
And what a good idea that is. My dad has an Android handset and he almost driven me insane with the "senior schoolboy errors" he was making on it. Everything from background Facebook updates via 3G/radio, auto text complete "issues" to attempting to connect to the neighbour's WiFi
In the end I cleaned the home screens up, only placing the Apps he wanted to access. I also had to give him a run down on when/why radio data and WiFi should be used as well as disabling the auto text feature.
Sometimes modern handsets can be confusing for the older folk, (my dad's in his late 70's) and a "not so smart" smart phone is probably what he needs.
I will certainly be looking at the Doro 740 as a future replacement. Well done on identifying a product that wont confuse the bejeezus out of my dad and also simplify my life.