There are many ways to
carry a
cell phone on your
belt. Most
phones come with a
belt-clip that attaches to the back of the
phone and then to your
belt. The problem with those is that they tend to
expose the phone
face and (in some models) tend to
break the
phone.
The second option is to buy a cell phone cover. These are normally made of leather or something similar. They make your phone bulky and ugly.
The best phone holder I found is actually an FRS Radio holster, that you can buy at Radio Shack for ten bucks. You just slip the phone in there, panel facing you, and use a elastic band to grab the phone's antenna, holding it in place. It fits most small phones nicely, like the Nokias series 5 and 6, most Ericssons and many others.