6230 phonebook (msf & txt file) cryped!

hey, everyone. I just searched the forum for my problem but couldn't find any hint for solving it.

I got a 6230 which was broken (sim card was not accepted) and therefore brought it to my local nokia dealer.
this guy downloaded the phonebook and sent the phone to nokia.
after he got it back he told me that he couldn't restore the phonebook because for some reasons I didn't understand (he told me something about a new firmware and stuff like that).

He copied everything to a disk and gave me that stuff.

I got 2 Files on disk for now : first one is an ".msf" and the second one is ".txt". both files seem to be crypted (at least that's what I see when I open it with some hexeditor).

I already tried to do some basic xor & not stuff on the bytes but I didn't manage to uncrypt that stuff.

does anyone have experience with this problem (or is there any software which can view me the uncrypted content of them ?)

please help !!!!!!!