Pantech Duo DTMF?
 

I know this phone is a smartphone, but those forums seem to be pretty dead. I need to enable long tones on this phone, and there is no option anywhere to do so. Does anyone have any suggestions? Would programs like HTCtweak or HTCustom work, even tho this is not an HTC phone? Can I just locate the files that play the tones when the keys are pressed, and change them?