You might like to read the FAQ Gabriel: http://www.truphone.com/scn/blog/faq.tru On 18 Jan 2007, at 12:25 pm, Gabriel Ambuehl wrote: > Doesn't really say how it works. "An all SIP solution" doesnt > really sound like it could ever be seamless with GSM. I'd really > like to know just how this supposed to work, because if they pulled > this off, it would be really huge.