If you have a subscription, choose how long your mobile rings before the call is diverted to voicemail. You can extend, shorten or disable the ring time (if you have a Pay&Go card, the caller will always be diverted to your voicemail after 15 seconds).
Enter *61*+32475151516**Number of seconds# on the keypad of your phone and press the call key (as if you were trying to call this number).
Instead of Number of seconds fill in a value (5, 10, 15, 20, 25 or 30 seconds). For example, type *61*+32475151516**30# to have your calls diverted to voicemail after 30 seconds.
Attention, don’t replace the number +32475151516 with your own number!