I have a hundred or so clients connected to my server using .NetStandard websockets. Yet, I have one client on 4g data using an Android OnePlus 5t (T-Mobile data) that cannot connect. My server never even receives a call to begin the connection. Note, that he can connect using wifi data. Below are the things I have tried. Has anyone had a similar issue or know what could be the problem and how it might be solved. This is a TCP connection over port 1334.