I went for a run on Saturday with all my music. Woke up today, nothing. The SD card is empty and there's only 5 songs on my phone! That's 50 songs lost and I don't even have a computer to use to put them back on. My computer died a few weeks ago, and I don't have any other. Now what? I've restarted, took out and replaced the battery and SD card. Nothing. Considering I definitely didn't do it, this is awful.
I am sorry to hear you lost all your music on your device. Unfortunately, if the music has been deleted, there is not a setting in the phone that will restore it. Is your phone still reading the SD card? Were these songs purchased from VZW or downloaded from another source. If purchased from VZW, you will need access to a computer to restore via V Cast Music with Rhapsody. If downloaded from another source, you will need to redownload those. There are also many applications in the Market that allow you to search for and download music.