I don't have the Maxx, but can see how this would be a problem. Something that I would suggest... and this may no longer be a household item, but a semi large eraser would probably do the trick. You know, the pink rectangular ones that you may have used at some point in school... possibly art class. It would stay in place on the desk/table as well as prevent the phone from sliding off. Not to mention that if you don't have one, they should be pretty cheap!