When you take your DI overseas, say, Germany, you want to be connected with your friends & family in USA, right?
Since, Fring, disabled their Skype add-on because of Iphone 4G users overhauled Fring's servers with video broadcasts (the only reason I keep Fring for video chat in DI), Fring comes very useful because it has a "SIP" add-on.
You do not have to go thru very complicated settings like sipsourcery & sipdroid & pbx on your DI, Fring's "SIP" add-on has it all !
Things, you need:
Wifi--->Google Voice--->Gizmo5--->Fring with "SIP" add-on for Gizmo5 = free in & out bound calls over Wifi !!!
* People in the USA will dial your local Google Voice number
* You, in Germany, will go to Google Voice Browser and dial out your friend's USA number, GV dials it, then Fring rings, you pick up and then you are connected to your friend's/relative's number in USA.
Who said that " free cheese " is only in the mouse trap ?
* ask someone to give you a GV invite
* buy Gizmo5 account on E-bay or google any for sale
There is no way to do a free international call ( call from usa to germany ), unless in germany, the person is on american Skype, or Skype with USA, Canada subscription, or using gizmo5+fring with sip add-on