Sprint PCS commonly releases two manuals in order to cut costs, and the T608 is no different. The first manual is referred to as a “start here” guide, which is included with the phone. It provides basic Sprint information as well as gets you started with powering on your phone, learning the basics, etc.
The second manual is the User Guide, and it is usually only available via download. Both require Adobe Reader (unless you are running Mac OS X). Both manuals are in the download section under the new Manuals download page.