*This applies for SIP-T53 and SIP-T53W*
Ringtones are set at the server level, meaning you cannot change them on your handset, we will do it for you.
If you go into MENU--> SETTINGS-->BASIC-->SOUND-->RING TONES-->COMMON, you can found a ringtone you like. Let us know the number corresponding to the tone you want and we can set it for you.