Bluetooth is a wireless technology that allows computers, phones and other devices to talk to each other over short distances (up to 100 meters). Bluetooth uses radio waves (in the 2.4 Gigahertz range), and is designed to be a secure and inexpensive way of connecting and exchanging information between devices without wires. Bluetooth is also another way of wireless transfer between your cell phone and your PC like sending mp3/music files, ringtones, photos to/from your mobile, exchanging business cards, sending voice from a headset to a mobile phone, and real-time satellite navigation using GPS. Most new cellular phones supports bluetooth as most wireless headsets for cellular phone uses bluetooth for connectivity. If you are using a fairly new laptop or a personal computer, it will most likely have built-in bluetooth transceiver.
However, if you have an older laptop or a personal computer, you will most likely require a bluetooth dongle (adaptor) on your PC/laptop to do this type of transfer. A bluetooth dongle is a small add-on that you can plug into a USB port; which will then allow you to send and receive files via bluetooth from you PC to a bluetooth enabled device (in our case, a cell phone).
Once you set up a bluetooth connection between your cell phone and your computer, you will need to download the ringtone to your PC first.
Then, you can transfer the ringtone to your cell phone using the bluetooth connection between your PC and your cell phone.
If your cell phone is already equipped with bluetooth and your PC or laptop is so-equipped, you can follow those easy steps to transfer ringtones:

# Select the ringtone from your fave sites that you would like to download to your cell phone. Most formats of ringtone are MP3 or MIDI.

# Instead of clicking “Download it”, right-click the “Listen” link and select “Save As” to save that free ringtone to your PC’s hard drive.

# Following your cell phone’s owner’s manual instructions, connect your PC to your cell phone using bluetooth.

# Using the bluetooth software on your PC, browse and find a folder on your cell phone where you would like to send and store your new ringtone (this is usually in the folder Sounds or Files)

# From your cell phone’s menus, assign the newly transfered ringtone to your phone’s ringtones (the technique will vary from phone to phone)

# If your cell phone allows it, repeat the process again with other ringtones.

You can also do that with any mp3 or compatible music file and games.

Have fun, fun, fun, fun!!!!!!!!