Just got my E72 which I also want to use connected to my Asterisk server. Installed the "Sip voip 3.x app" for advanced settings and got to a point where I was getting "registration failed". So I reset to factory defaults to start again only to find now I can't create a "New SIP profile/Use default profile" as it must be missing now. I removed and reinstalled this Sip voip app again still nothing appears. What am I doing wrong????