someone calls, leaves me a voicemail, i get an SMS but the voicemail indicator (the little tape icon o_o ubin the picture below) does not light up on the phone tile on my windows phone.

apparently, if you are on Vodafone you can call and ask for MWI (message waiting indicator) to be enabled.  

sbiddle sent me an MWI message from his SMS gateway and proved that, with the right message, the indicator can work.

When i rang 2 deg care i didnt have much success.  They refered me to teh procedure for enabling SMS notifications (after i told them i'd tried that) and subsequently told me that their colleague also has an android mobile and that it worked for them....