UltraSn0w disables MMS on my AT&T iPhone 4 - Does it happen to yours?

Hello, I've confirmed on my Jailbroken iPhone 4, that the latest version of ultraSn0w disables MMS. I install it, send a picture, doesn't send, uninstall it, it sends, I install it again, doesn't send, uninstall it, and it sends. Now make sure that when you do have it installed, not to disable MMS in Settings > Messages and reboot, because you will get No Service all the time until you uninstall it and restart your SpringBoard. I don't know if its just my iPhone, but it also did this before I restored it because I could not find the problem. In a video during the testing stages of ultraSn0w, produced by planetbeing, he stated that this unlock "sucks", he said it was very buggy. So MMS is probably still a bug that needs to be resolved. I installed the ultraSn0w unlock in case my father cancelled my AT&T plan, I could go and get a prepaid T-Mobile SIM. But if I did that I would lose MMS, texting, and internet, so what's the point of losing MMS now if I can still use it? Anyway, I was just wondering if any of you guys can test this out for me and confirm it? Also, I must mention, that sometimes MMS would work during daily use, and sometimes it wouldn't. So its on and off and you may have to test it at different times. Thank you very much for your answers!