Samsung USB not showing in Ubuntu 18.04

I tried to install mtp , terminal says libmtp is the newest version and finally this answer worked for me.

$ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 0BB4A1B2FA1A38EB
$ sudo add-apt-repository "deb http://ppa.launchpad.net/samoilov-lex/aftl-stable/ubuntu artful main"
$ sudo apt-get install android-file-transfer