How to make your VOICEMAIL button work on iPhone
October 1st, 2007
If you, like me have an iPhone and can’t use the VOICEMAIL button for anything, then read on.
You can change the button to call a predefined number by issusing the following call:
*5005*86*xxxxxxxx#
and then press CALL.
Change the xxxxxxxx to your voicemail number or .. your mother 