Adding ring tones and wallpapers to the MetroPCS vx3200 is really easy. The phone supports MIDI and MP3 files for ring tones and BMP, JPG and PNG files for wallpapers, and the process for adding content is similar for both ringers and images.
To add ring tones
You may use either MIDI or MP3 files. Most MIDI files worth without modification, while MP3 files need to be 16kHz mono files at a low bit rate like 24 kbps. Both MIDI files and MP3 files must have the extension .MID.
Using Bitpim, copy the .MID file to /user/sound/ringer and then delete the file /download/dloadindex/brewRingerIndex.map.
To add wallpapers
Images must be 114 pixels tall by 128 pixels wide or smaller. The image will be displaced below a 14 pixel banner that runs along the top of the screen, which is 128px x 128px.
PNG and JPG are great formats to use if you would like to reduce file space, but BMP is also usable. JPG images do take some time to render when viewing the files on the phone so I recommend PNG as the preferred format.
Using Bitpim, copy the image file to /brew/shared and then delete /download/dloadindex/brewImageIndex.map.
After you’ve added media to your phone
After you’ve followed the steps above for either media type, you must reboot your phone for the content to be usable. Once you have rebooted, you can find the ring tones and images in Menu - Tools (7) - My Media (8)
A note about GIFs
It seems the phone recognizes GIF images, but does not render them. If anyone can get a GIF image to work please let me know.