1) Can individual ringtones be assigned to individual callers?
2) How do you delete downloaded ringtones?
1. Yep. Open the contact and edit the contact. Scroll down and tap Additional Info. Scroll down more and you will see the option to assign a ringtone.
2. Use a file manager app, navigate to where you downloaded the file, and delete.
Any spelling/grammatical errors are not indicative of my failure to command the language, but rather are due to typin' on teh phonez.
Comin' at you live from DX.