Zello+channels+australia -

I need to structure the content clearly. Start with an introduction to Zello, then discuss channels in general, and then focus on Australia. Make sure to cover how channels are used there, popular channels, any legal aspects, and examples. Also, maybe mention alternatives or other apps used in Australia compared to Zello. Wait, but the user specifically wants Zello. So focus on Zello's features and Australia's usage.