Default [Q] xxudnc1-modem Needed

Good Day Guys. Need some help please. When I flash official firmware for my country "N900XXUDNC1_N900OJVDNA3_XFA". Inside folder is (N900XXUDNC1_N900OJVDNA3_N900XXUDNB1_HOME.tar), I have no signal, unknown baseband and no IMEI number. I did not backup EFS. The only rom working for me is V14. So basically flashing official firmware does not fix my problem. Can you help me please.