Anyone know what the different model numbers mean?

[Mark 42]

There are at least three S2 Skyrocket i727 model numbers

SGH-I727MSAATT

SGH-I727DAAATT

SGH-I727ZWAATT

Can anyone tell me the difference?

 

[Mark 42]

Anyone?

 

[hell911]

i knew the meaning of those letters, cant remember... will post again..

 

[Mark 42]

Please let me know.
ATT was no help:
http://forums.androidcentral.com/t-galaxy-s-ii/324645-my-online-chat-att-cust-support.html