I have not measured the latency but if both participants are on wifi there is usually no perceptible latency with my participants. (US -> UK calling daily) If

I have not measured the latency but if both participants are on wifi there is usually no perceptible latency with my participants. (US -> UK calling daily) If either of us is on mobile, sometimes latency can creep in, but this also happened on whatsapp too. That's the nature of mobile IMO.