We do have some similar things, like Meshtastic for messages, but that’s just texting via radio. As far as calls go, it’s mostly also just radio for now.

Session tried to get a call and text system setup whereby anyone can host a node, similar to a TOR node, but their foundation didn’t reach the funding total. The work is done, but some services are gonna be scaled back a bit. There is definitely a considerable push for systems like that, but they’ll take a bit of time for implementation as it’d otherwise just be another company owned service that’s outside our control.