Find "Tones"
Press the Navigation key.
Scroll to Settings and press the Navigation key.
Scroll to Tones and press the Navigation key.
Select ringtone
Scroll to Ringing tone and press Navigation key right to select Open Gallery or the current ringtone.
If you select Open Gallery:
Press the Navigation key.
Go to the required folder.
Go to the required folder.
Highlight the required ringtone and wait a moment to hear it.
Press the Navigation key to select the ringtone.
Save and exit
Press the Navigation key to save.
Press Disconnect to return to standby mode.