At least you can use a different controller.
There's no cure for the mind-blowingly awful design decisions of the Ngage.
I owned the QD for a few years, and although it's sufficiently powerful and has some great games, the awful sideways screen and lazy button layout was just not suited to the system's library. If it had gotten some vertical shooters and had proper buttons, I could look past any other flaws, I suppose.
I can't imagine how bad the original design would have been.