We both have T-Mobile and she only recieves some of my MMS. If it says "Delivered" on my phone she doesn't receive them. If it just says the time it was sent, she receives it. I tried adding a pic in the messaging app and I "Sharing" a pic and click "messaging" and send it that way. There is NO rhyme or reason. My wife receives mms from others perfectly, and I receive ALL of her MMS. Any help would be great!!!