hi mahdsip, currently the conversation has to be initiated by a desktop user - but if you have a call link you can also take part in a call via firefox on android (firefox hello works without the need for plugins)...

OK, thanks!! Any idea on when will be possible to initiate the call through andorid version?

i asked the team developing firefox hello about this. the feature for firefox on android is on the long-term roadmap but development hasn't started yet, so it's not possible to give a time-frame unfortunately (other than it's going to take at least a few months)...

Just so you guys know....It would be fabulous to use this on my phone and as always I am rooting for Mozilla :)

This no use barrier for me. I donated another few money to Mozilla after tested Hello works on my Desktops. Hope will reach Android too. Actually greatly concerned reasoning behind of communication tech if not works phone to phone.