Customizing ringtones for your BlackBerry is essentially user-friendly and can be done directly from your device. The various BlackBerry models feature an option to use different ring tones for e-mail or SMS (text) notification as well as to identify individuals in your address book. The BlackBerry features preloaded ring tones that can be accessed from your phone. You may also use music or sound effects you have downloaded to your phone or purchased from the BlackBerry website or other websites.

Selecting a Ring Tone from Your Phone

BlackBerry models feature preloaded ring tones that can be accessed directly from your phone through the "Profiles" icon. You may also select from music or sounds you have already downloaded and saved to your phone's MEdia card through the music option under the "Profiles" icon.

Purchasing Ring Tones

To further customize your ring tone, purchase a tone utilizing various websites, which either charge per download or for a subscription---this will allow you multiple downloads within a certain time frame. The official website for BlackBerry offers a small variety of free choices that can be accessed through your phone's browser. Tuneusin.com and cyzeal.com provide access to a library of free ring tones. Jamster.com, handango.com and funtopia.com are subscription-based services.

Converting Playlist Music to Ringtones

You may also use music from your iPod or MP3 playlist as a ring tone without incurring additional charges. If you have downloaded a song to your phone, you can access the song through the "Music" option from the "Profiles" icon. To convert songs on your iTunes playlist, download the Media Sync application at blackberry.com. Connect your BlackBerry to your computer using your phone's USB cable, which will allow you to sync your playlist to your phone.

Changing Ringtones

From your phone's home page, scroll to the Profiles Option. From here, select "Normal" or "Loud." Scroll down and click on "Advanced." Clicking on the Menu key (dotted key to right of green dial key) will bring you to options, including "Show Ring Tones" and "Edit." The "Edit" option will allow you to assign various ringtones to email and text notifications. To assign caller ringtones, select the caller through your phone's address book. Using the Menu key, select "Edit." When caller's information appears on screen, select "Edit" again, which will bring you to the option to "Add Custom Ring Tone."

Source:

Sprint: Nine Steps to Change Ringtones on Sprint BlackBerry Curve 8330

bbgeeks.com: The Complete Guide to BlackBerry Ringtones

BlackBerry: BlackBerry Themes; BlackBerry Ringtones and BlackBerry Wallpaper