How To Find Your Downloaded Ringtones?
To change the ringtone on yourSidekick, perform the following steps:
1. At the
Jump screen, select
Phone - Make sure you click on it!
2. Press the
Menu 
key.
3. Scroll to and select
Settings.
4. Select
General.
5. Scroll to and select the Incoming phone call ring field.
6. Select the tone category.
7. Scroll to and select the tone.
8. To save, press the
Done 
key.
NOTE: At this time, mp3 files cannot be used as a ringtone unless you are on Telstra (Sidekick MP3 Ringtones) in Australia.
Sidekick LX 2009: You are able to send free ringtones to your sidekick with the LX 2009 model. Email yourself an MP3 file that is 100kb or smaller in size. Once you receive the email on your device, scroll to the bottom and choose "Add to Ringtones" and presto, there ya go.You can use this free ringtone editor to chop up your own mp3 files and email them directly to your sidekick.