I have a Sprint Treo 650 for my work stuff, and my personal phone I have had for some time is a Samsung i500. I want to use a belt clip for my i500 but they are very hard to find that fit the standard and extended batteries and I no longer have a slim one. I was wondering if anyone has used one of the numerous "Universal belt clips" I see all over the place? How well do they stick, and do they last?