I had the idea of maybe using Skype on every stage crew members' smartphone and setting up a group conversation to use it as a "full duplex" system, where everyone can talk to everyone at once and without having to wait until the other person has finished speaking and pushing a button to talk (and so on)...
The stage crew uses either Android or iOS devices, meaning that I need an app (if not Skype), which can run on both platforms.
I really don't want to hire or buy a stage intercom system, so would Skype be a suitable way to communicate in "full duplex" mode if the stage crew had it installed on their phone, and a headset with mic attached to it?
Or are there any other apps that would do the same job and work full-duplex and don't require you to push a button to talk?
Cheers, I hope you have got some ideas.