The present is more a general UI "style" question, than a programming question. I notice that the position of the "home" key in a tablet, for example, is very near the back one. Now, while th Back keypress can be "trapped" and managed, the "home" one not. In one of my apps, I decided to systematically use the back key to return to previous screen, without explicitly putting a Back button. The result is that often happens that the user closes the app, against his will, just because his finger touched the Home key instead of the Back one. This is probably a very stupid problem but it seems to me a real problem. My question is then: is it better to always put a Back button (just to reduce the possibility of unwanted Home key pressing) or what else can be done? Thanks in advance for any comments..