Under settings, there is a option for Buttons. Once selected, it says there is one button that can be assigned to do whatever.
Which button is this for specifically? I tried to set this to be assigned to the phone, for instance, and held down the center button, thinking this is what it was for, and nothing happened.
Which button is this being assigned to?
Does it work for anyone else?
If this is for the Tilt (per your profile), all buttons should be remappable. Which button number is this (and which program did you map)? Also, there should be a symbol near the words indicating which button it's for.
If Fuze - which from your question, it appears to be. It is for the lower left (phone facing up) button - to use it, you need to hold it for three seconds to activate voice command. It can be remapped to whatever appears in the window at the bottom of the screen.
You don't need to assign it to phone, since the lower left button already activates the phone with a short touch.