SIP Client on Zorin

I need a sip client to make calls from my laptop. I have an account from voipinfocenter. What is the best SIP client with a nice UI?

Swarfendor always recommended Jitsi.

Jitsi meet is open-source video conferencing alternative to Zoom. https://jitsi.org
I don’t know about installing it on Linux though.

Signal is open-source messenger/calls/video calls alternative to WhatsApp, Skype etc. https://signal.org/
Signal Linux debian install here https://signal.org/download/linux/
Signal Desktop can also be found in the Zorin Software Store (Warning: This listing is a Snap app)

FYI. https://itsfoss.com/install-signal-ubuntu/