Can't send/receive MMS on Wi-Fi

¡Hola, @magenta4936749​!

I did some digging and was able to find that there is a known issue with Galaxy S7 Edge models that have an issue when handing off WiFi to the data network when trying to send MMS'. My recommendation would be to talk with Tech Support via 611 or T-Force (Facebook/Twitter) to get a ticket filed with our Engineers. By chance, have you already done this? If not, give that a shot and keep us updated on the outcome of the ticket.