hello

i discovered a while ago SIP and XMPP protocols, which i think are highly better than gafam's services. maybe im wrong, i dont know.
i'd lovely try to do some tests calls to see if it works well, from people who just want, around the world, to check if the communication could be correct (or not?) over different countries/continents

for sip, there are several free providers, listed eg at sipbrokers
clients are zoiper, linphone etc

for xmpp, there are also various providers, whom can be found on the xmpp.org foundation list
clients for windows, linux and unix likes is dino (to manage jingle)
for android, conversations.im
for iphone, monal.

its just to test the quality of worldwide communication with non-gafam products, it's totally free over the internet, even with the common phone (pstn) to sip networks (normally)

dont hesitate to ask or to PM me if you have questions