Android mobile app is similar to radios terminal ,which can realize one to one private call,one to many group calls,monitor,GPS positioning.
Ø Login interface
Ø Different URL
You should select corresponding URL, as different URL is related to different servers,For example ,if you are from Australia, you should select Australia.
Ø Group list
You can select one group to make calls.
Ø Privte call
You can select one radios account to realize one to one private call.
Ø Group call
When you enter one group,you can make one to many group calls.