How to install the latest release Linphone on desktop environment

On Debian or Ubuntu system, not released yet the latest version of Linphone. So I will show you how to install the latest version of Linphone on Ubuntu 16.04 system. Update from Linphone 3.6.1 to 3.9.1.

All you have to do is add the ppa to your system, update the local repository index and install the linphone package. Like this:

$ sudo add-apt-repository ppa:linphone/release
$ sudo apt-get update
$ sudo apt-get install linphone

Optional, to remove linphone, do:

$ sudo apt-get remove linphone

or for also deleting config file,

$ sudo apt-get purge linphone