[asterisk-users] T-Mobile and WiFi Voip

[Andres]

I had a friend yesterday showing me his new T-mobile blackberry with 
WiFi Voip.    I could not believe it until I actually saw him making 
calls.  There is no T-Mobile cell coverage at my house but he was able 
to simply access the WiFi router and make the call.   It appears this 
VoIP offering is tightly integrated since you use the same phone number 
to make and receive calls over WiFi or Cell.

Does anybody know if its SIP?  I wanted to get some packet captures but 
he was in a hurry.

-- 
Andres
Technical Support
http://www.telesip.net