Name: CCLTE
APN: ccdata
Proxy: <blank> (shows up as Not Set)
Port: <blank> (shows up as Not Set)
Username: <blank> (shows up as Not Set)
Password: <blank> (shows up as Not Set)
Server: <blank> (shows up as Not Set)
MMSC:
http://mmsc.mobile.att.net
MMS Proxy: proxy.mobile.att.net
MMS Port: 80
MCC: 310
MNC: 410
Authentication Type: None
APN type: default,mms,agps,supl,fota
APN Protocol: IPv4
APN Roaming Protocol: IPv4
Bearer: Unspecified
MVNO Type: None
Note: In the APN type, there are no spaces after the commas. If you enter spaces, the whole thing won't work.
Anything not in the list that you have in your phone is probably not changeable - if it is, just leave it as it is.