Fix for T-Mobile MMS not working with Wifi [Calling] connected. (Group and Picture texts)

    I like to buy my own phones and bring them to my plan. Sometimes this results in not having the full config to make the phone work 100% on a carrier. I recently fixed issues where I could not receive MMS messages if I had an active wifi connection. When my phone is on wifi, it chooses to send and receive messages and calls over wifi instead of the cellular service. Unfortunately, I was missing this in my APN config!

    APN settings: (Changes I made to my settings in brackets. Full quote is from source)
    Name: T-Mobile US LTE
    APN: fast.t-mobile.com
    Proxy: Not set
    Port: Not set
    Username: Not set
    Password: Not set
    Server: Not set
    MMSC: http://mms.msg.eng.t-mobile.com/mms/wapenc [ADDED THIS]
    Multimedia message proxy: Not set
    Multimedia message port: 80 [ADDED THIS]
    MCC: 310
    MNC: 260
    Authentication type: None
    APN type: default,mms,supl [ADDED mms to my existing list]
    APN protocol: IPv6
    APN roaming protocol: IPv4
    Enable/disable APN: APN enabled
    Bearer: Unspecified
    Mobile virtual network operator type: None
    Mobile virtual network operator value: Not set

    Source: https://support.t-mobile.com/message/626402#626402