Can anyone recommend a similar service that provides true high-quality video chat functionality on par with FaceTime but not requiring Apple hardware (but still easily usable on mobile)?

We're looking for such a service for use in developing countries where iPhones are rare and connectivity is often mediocre at best.

Tests with the like of Telegram, Duo and others have been okay-ish for voice-only calls but pretty bad for video. Mostly because of lack of Apple hardware on the other end we are until now unable to conduct any comparative tests to see whether FaceTime would outperform these apps in terms of quality and stability.