Angry [Q] S6500D baseband?

Hi there,

I have a question regarding my GF's S6500D. I think this is the right section for my question. Didn't find anything regarding basebands for the S6500D.

Her phone has been repaired by some sucky repair company. (White screen of death), but the connection is very bad since then. No problems at home (which is strange), but @work she gets no receipt, which annoys her very much.

Is there some other baseband i can try? With my (old) X10 there were plenty of basebands available, but the S6500D...?

Thanks in advance!