Well your guide worked great but i cant send MMS, i talked to an AT&T rep today and he said he unblocked MMS but it isnt working
keep trying.....did u have the rep send mms testing to you???
restart the phone enter the mms apn settings.
if not....go to settings /general/ reset/ reset network settings then reboot and retry inputing the mms apn settings....
like i said have att rep send you an mms it worked TODAY for me