Is it possible to join a Skype call from the Skype iPhone app? And how exactly is this done? Skype's website is rather foggy about this. The Skype help says only: "To join your Skype group call from a mobile or landline, your friends need to dial your Skype Number. You can then add them to the group call in Skype." Does that mean that in order for "User C" to join a Skype call between "User A" and "User B", "User A" (who initiated the call) has to have a Skype number (not just a Skype name), and "User C" then has to dial this Skype number either from a) the Phone app on the iPhone, or from b) the Skype app on the iPhone (which means that "User C" needs a Skype-Out credit)? Or does it mean that there has to already an existing group call between at least three users (on computers, not on iOS devices) before a fourth user can join this group call as described above? Or how else is this done? Is there somebody here who has firsthand experiences with Skype group calls from an iPhone Skype app?