asterisk users - Sep 2012 - ASTERISK VOICEMAIL NOTIFICATION TOM MOBILE

Hi now I am frustrated with configuration for setting up voicemail
notification to my mobile using some sms gateway. I am not getting any
info about this can anyone help me out how to do this and what all I
have to do in Sip.conf, ext.conf, voicemail.conf. Please clarify me
the complete procedures to complete this project

Thanks
Darin IV