here are two ways to setup a ringtone for incoming calls.
- From the Home screen tap Settings > Sound
& display > Phone ringtone. Tap the
ring tone you want to use on the list, and then tap OK.
- You can also use a music file as a ringtone. To set up a music
file as your ringtone, please use the micro USB cable to connect the
phone to a USB port on your computer. The Connect to PC
dialog box displays and prompts you to choose Disk drive
> Done. Your phone's SD card is mounted as a drive
on your computer. You can now copy music files to the SD card.
After you have finished copying, open the notifications panel (by
touching and then dragging the status bar down) on your device; then in
panel, touch Charge
Then tap All programs
> tap the music you want to set as a ringtone (the music will start
playing) > press Menu
> Set as ringtone
You can set the music file as a Phone ringtone or Contact ringtone or
you can select Trim the ringtone.