lol I know it's a softbank phone but if I asked it's because I want to understand how it works ^^ I though the most important was operator in my case Bouygues
I don't use softbank mail app even if I can't disable it. I only use GoSmsPro to send and receive sms/mms.
So if the app use my APN, I really don't understand why I can't receive mms.
Only MCC and MNC can explain the problem