I just upgraded to the AT&T released 4.5 OS.. I have no problem sending or receiving MMS... my issue is somewhat smaller and more of an annoyance... When someone sends you MMS I had always been able to tell who they also sent it to and a bunch of other details... Ever since I upgraded this OS it doesnt show anything anymore... Ive checked the settings but I dont see anything that controls that... This isnt the first 4.5 OS I install on my phone so idk if this is an AT&T specific thing or if its even an OS thing... I know it might sound stupid or whatever but every time me and my friends exchange crap we know who we all sent stuff to and now I dont :( i'm out of the loop...