Good summary of several red-flags in regards to using the Signal messenger.
Also interesting is this one.
Use a locally hosted XMPP with the Conversations client :)
Good summary of several red-flags in regards to using the Signal messenger.
Also interesting is this one.
Use a locally hosted XMPP with the Conversations client :)
Check if your server is in this list. https://compliance.conversations.im/test/stun/
Second, any contact you wish to call must be both on one of the above servers and have a client that supports calling (such as the ones previously mentioned).