I just talked to Tmobile support. I ended up deleting the default pictures that were not functioning. (I guess this was not a smart thing to do) They said that someone who has a 7100T could email me the stock pictures and I could simply downoad them to a folder.
My e-mail is:
The ones I'm most interested in are the Dunes pictures. If someone would be kind enough to send me these - I would be most happy.
Thanks in advance.