I do not use MMS, but from what I have an understanding of, this would only operate in distinct instances. Like when you're are all on iPhones or all are on phones that assist the RCS messaging system. Generally when you are not truly using the MMS purpose. Tello FAQ https://nonvoipnumberfree35791.dm-blog.com/37925478/the-2-minute-rule-for-non-fixed-voip