Well, first I looked up your user manual on google. I found it
HERE. You can use adobe reader to search key words, and that's how I skipped all the way to manual pg 78 (adobe pg 40).
Sounds (Menu, 7, 2)
Allows you to choose the ring tones heard for incoming calls.
1. Press Left Soft Key, 7, 2.
2. Use Up, Down Arrows to highlight your selection.
beethovens_fifth / dreamsequence / ode_to_joy /
rainforest / train
3. Press
● Left Soft Key Set As
Set As Contacts / Set As Caller ID / Set as No
Caller ID / Set As Restrict
●
Right Soft Key Options
Rename / Erase / Erase All
If there is a separate menu for downloaded ringtones as there is on my phone, the deletion process should be very similar. It's probably in the manual too. Hope this helps.