Your Tag 3G sports a microSD memory card slot. If your laptop or personal computer has a slot for that card format (Most laptops are so-equipped), you should be able to transfer a music file
If all of the above techniques do not work with your Plum Tag 3G or if you don't want to buy extra accessories, you can still use one of various free '3G Uploader' services available online. You should find plenty with a simple Katapulco.com search. 3G uploaders are simple to use: Save your own music on their web site and they will return a temporary URL. Pointing your Plum Tag 3G's web browser to that address should download the free ringtone.
Here are some of the free ringtones (compatible with your Plum Tag 3G) we offer:
Free Horror Ringtones Free Ghost Ringtones Free Ringtones-a-gogo Free Techno Ringtones Hear All Our Free Polyphonic Ringtones