I have been using all types of cases for previous Treos, including Palm's, Krusell, & Vaja. I usually get the one with leather which clips on a belt clip. The problem is that the case sometimes gets unclipped from the belt & it falls. So now I got a horizontal case with belt loop which requires the Treo to be naked. So I got an Invisible Shield installed. It makes it grippier. In fact, the installer was doing several iPhones. Check it out www.invisibleshieldca.com