Hi, everyone. I'm new to both WPCentral and Windows Phone itself. I very recently purchased a Lumia 1020, and also updated to Windows Phone 8.1 on Monday. I'm having a few questions about Rooms and Groups and am hoping you all can clarify a few things for me, or at least point me in the right direction. Firstly, I did go to windowsphone.com where I found the linked information, but I kind of wanted to hear it from someone else who has maybe used this more than I have. So if I start a Room or a Group on Windows Phone, what happens regarding chatting with people within the room or group? I understand that it sends a text message to invite someone to the group or room. Once someone accepts and joins the group or room, will it continue to utilize SMS from my carrier, or is it exclusively data-based, like iMessage or Hangouts?