To make calls, first select the contact from the list and click on the name
Press and hold the large button in the middle of the screen.
If the person is online, you will hear a beep and the button will have blue details.
At that moment, without releasing the button, you can speak and the message will be transmitted instantly to the receiver.
To end the message, just take your finger off the button and the screen will return to normal. If the contact is not online, "disconnected" will appear below their name on the call screen.
When you receive a call, you will hear the message even if the app is in the background. Green details will appear.
You can adjust the volume of calls and beeps in the app settings.
If you want to change the way you press the button to make calls or insert a shortcut for headphones, access the "PTT button" setting.