I run my own mumble server and regularly conference with people from Europe (and my server and I are in the US). In my experience, 4G doesn&#x27;t have the insane latency variance 3G does - its usually only around 200-300ms. If you are having half second or more delay it gets really hard to hold a conversation, but there is also the factor that people adapt fairly alright to asynchronous verbal communication - people with good manners get in the habit of waiting for responses. People on my server usually get 150-200ms just from the hop across the bay.