Unhappy [Q] HTC One Mini (M4) Official ROM

Hi

I had purchased HTC One Mini but it was rooted, I need to unroot the device. I did S-Off and changed the CID to 11111111.
Now I am looking for RUU (GSM based) would be good if I get Europe image because I am using GSM based network.
HTC Dev has Cingular image, can I install this ROM to my device? would my SIM be working on it or not?

Regards
Junaid