I now have a Oneplus 7t and still I can't send or receive mms on this phone either. I'm not interested in sending them, I have whatsapp for that, but occasionally someone will try to mms me and I get the dreaded failed to download message repeatedly.
The default settings don't work me or the settings on this page
Can anyone advise - paticularly if you have a oneplus 7t, what the apn settings should be. Thanks