I have recently purchase a Boost Mobile Samsung Galaxy Prevail and it comes with Android 2.3 Gingerbread. I want to use the phone to talk (I don't care much about video chat) to my brother who is in the Marine. When I open Google Talk, it only has the message chat. There isn't an option to call. So I went to Google Play and attempt to install TALKATONE but It says not supported. Did I do something wrong? How do I call using my gmail account to my brother who is stationed overseas? I know my last option is to install Skype in my Samsung Prevail and my brother's iphone. I would rather stay with google if I can. Any help is appreciated.