I've seen a bunch of posts/answers on here regarding people with At&t compatible Straight Talk sim cards who have had issues with receiving/sending MMS. However, I haven't seen anything regarding issues with T-Mobile compatible Straight Talk sim. I have a T-Mobile HTC 8x and can't get MMS to work no matter what I put in the settings. I finally got the internet to work today now I just need some with the MMS. Could someone PLEASE help me out?