I found this here: http://iphoneza.co.za/showthread.php?1129-Voicemail-on-MTN Essentially to set the timeout before it goes to voicemail Dial: *61*XXX1483XXXXXXX*11*20# e.g. if your number is 083-1111111 then dial *61*08314831111111*11*30# Very usefull 30 seems to be the max.
Just some opinions and things I have committed to virtual prosperity just in case UGAF