By checkiing this option, you can send Ringtones in RTTL format:
Send message window will change as follows:
Here you can load ringtone from file (*.RTX format for RTTL ringtones), specify it's style (Normal, Continuous, Staccato), play rate, scale, note duration.
To write a new melody and cancel current choose 'New melody' option.
To play melody you should press 'Play' button, to 'Stop' current melody press 'Stop' button.
See also: