Ohhh, I see where the problem is.
I keep assuming no-wipe is in the option -> option, since the post I read mentioned "no-wipe" before "Flash Stock and Unroot".
It is actually after you press OK to acknowledge the possible wipe with flashing.
Thanks a lot! It does allow me to use LTE.
I found out my phone switched to LTE couple minutes after I post the reply.
I had another APN setting, and it also works with the setting you provided.
So the key here is to talk to a knowledgeable tech ...
I just got a White 32GB!!!