This is the best settings that I found for att I'm go to list it here and will link the video right to it.
Name: att
APN: pta
MMSC: http://mmsc.mobile.att.net
MMS proxy: proxy.mobile.att.net
MMS port:80
MCC:310
MNC:410
APN type:default,fota,mas,supl,hipri,mms
APN prtocal:IPv4/IPv4
Bearer: none
Video Tutorial: http://www.youtube.com/watch?v=gMyD8zqk-Hg
Follow us on FB! https://www.facebook.com/AndroidTipsnTrix
Name: att
APN: pta
MMSC: http://mmsc.mobile.att.net
MMS proxy: proxy.mobile.att.net
MMS port:80
MCC:310
MNC:410
APN type:default,fota,mas,supl,hipri,mms
APN prtocal:IPv4/IPv4
Bearer: none
Video Tutorial: http://www.youtube.com/watch?v=gMyD8zqk-Hg
Follow us on FB! https://www.facebook.com/AndroidTipsnTrix
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