1, you can not synchronize the phonebook with your PC in a convenient way. I had to code a program to generate single vcard files and send them over bluetooth ONE BY ONE. There seems to be no way to do it without bluetooth.

2, you can not apply mp3 files as ringtones. However you can download mp3/aac ringtones from sprint (for a fee). Oh the original ringtones that came with the phone? They are just awful.

