I think you should try Voxer. It is a walkie-talkie app. Yes, there have been many, but this iOS and Android application seems to be the one that's garnering the interest of venture capitalists in Silicon Valley, in no little part because young individuals are eating it up. Check this out: MODERATOR EDIT: Sorry. No external links allowed. Moreover, it is similar to the kind of walkie-talkie capability offered by Nextel, but with a twist: users can go back and listen to any part of the conversation on demand, and other users can easily join a conversation. That is totally amazing, isn't it?