Android App with Openfire for Voice calls

Good day everybody,

i,ve Openfire installed and configured it,s working very well with Conversations and Xabber.
but they dont have voice and video call, i read and understand that for Server side i need to install STUN, TURN or Jingle Nodes server, i have the following questions,
1- by installing the mentioned above should i configured something to complete the server side configuration or just install and let the server works.
2- what kind of Android Client application like Conversations and Xabber support voice and video calls and do both support somehow.
Thanks in advance.